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Tuple`3.xml
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Tuple`3.xml
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<Type Name="Tuple<T1,T2,T3>" FullName="System.Tuple<T1,T2,T3>">
<TypeSignature Language="C#" Value="public class Tuple<T1,T2,T3> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable" FrameworkAlternate="dotnet-uwp-10.0;netcore-1.0;netcore-1.1;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-1.0;netstandard-1.1;netstandard-1.2;netstandard-1.3;netstandard-1.4;netstandard-1.5;netstandard-1.6;netstandard-2.0" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit Tuple`3<T1, T2, T3> extends System.Object implements class System.Collections.IStructuralComparable, class System.Collections.IStructuralEquatable, class System.IComparable" FrameworkAlternate="dotnet-uwp-10.0;netcore-1.0;netcore-1.1;netstandard-1.0;netstandard-1.1;netstandard-1.2;netstandard-1.3;netstandard-1.4;netstandard-1.5;netstandard-1.6;netstandard-2.0" />
<TypeSignature Language="DocId" Value="T:System.Tuple`3" />
<TypeSignature Language="VB.NET" Value="Public Class Tuple(Of T1, T2, T3)
Implements IComparable, IStructuralComparable, IStructuralEquatable" FrameworkAlternate="dotnet-uwp-10.0;netcore-1.0;netcore-1.1;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-1.0;netstandard-1.1;netstandard-1.2;netstandard-1.3;netstandard-1.4;netstandard-1.5;netstandard-1.6;netstandard-2.0" />
<TypeSignature Language="F#" Value="type Tuple<'T1, 'T2, 'T3> = class
 interface IStructuralComparable
 interface IStructuralEquatable
 interface IComparable" FrameworkAlternate="dotnet-uwp-10.0;netcore-1.0;netcore-1.1;netstandard-1.0;netstandard-1.1;netstandard-1.2;netstandard-1.3;netstandard-1.4;netstandard-1.5;netstandard-1.6;netstandard-2.0" />
<TypeSignature Language="C++ CLI" Value="generic <typename T1, typename T2, typename T3>
public ref class Tuple : IComparable, System::Collections::IStructuralComparable, System::Collections::IStructuralEquatable" FrameworkAlternate="dotnet-uwp-10.0;netcore-1.0;netcore-1.1;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-1.0;netstandard-1.1;netstandard-1.2;netstandard-1.3;netstandard-1.4;netstandard-1.5;netstandard-1.6;netstandard-2.0" />
<TypeSignature Language="C#" Value="public class Tuple<T1,T2,T3> : IComparable, System.Collections.IStructuralComparable, System.Collections.IStructuralEquatable, System.Runtime.CompilerServices.ITuple" FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netstandard-2.1" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi beforefieldinit Tuple`3<T1, T2, T3> extends System.Object implements class System.Collections.IStructuralComparable, class System.Collections.IStructuralEquatable, class System.IComparable, class System.Runtime.CompilerServices.ITuple" FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netstandard-2.1" />
<TypeSignature Language="VB.NET" Value="Public Class Tuple(Of T1, T2, T3)
Implements IComparable, IStructuralComparable, IStructuralEquatable, ITuple" FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netstandard-2.1" />
<TypeSignature Language="F#" Value="type Tuple<'T1, 'T2, 'T3> = class
 interface IStructuralComparable
 interface IStructuralEquatable
 interface IComparable
 interface ITuple" FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netstandard-2.1" />
<TypeSignature Language="C++ CLI" Value="generic <typename T1, typename T2, typename T3>
public ref class Tuple : IComparable, System::Collections::IStructuralComparable, System::Collections::IStructuralEquatable, System::Runtime::CompilerServices::ITuple" FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netstandard-2.1" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi serializable beforefieldinit Tuple`3<T1, T2, T3> extends System.Object implements class System.Collections.IStructuralComparable, class System.Collections.IStructuralEquatable, class System.IComparable" FrameworkAlternate="netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7" />
<TypeSignature Language="F#" Value="type Tuple<'T1, 'T2, 'T3> = class
 interface IStructuralEquatable
 interface IStructuralComparable
 interface IComparable" FrameworkAlternate="netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi serializable beforefieldinit Tuple`3<T1, T2, T3> extends System.Object implements class System.Collections.IStructuralComparable, class System.Collections.IStructuralEquatable, class System.IComparable, class System.Runtime.CompilerServices.ITuple" FrameworkAlternate="netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1" />
<TypeSignature Language="F#" Value="type Tuple<'T1, 'T2, 'T3> = class
 interface IStructuralEquatable
 interface IStructuralComparable
 interface IComparable
 interface ITuple" FrameworkAlternate="netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1" />
<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.0.20.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.2.0.0</AssemblyVersion>
<AssemblyVersion>4.2.1.0</AssemblyVersion>
<AssemblyVersion>4.2.2.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<TypeForwardingChain>
<TypeForwarding From="mscorlib" FromVersion="4.0.0.0" To="System.Runtime" ToVersion="0.0.0.0" FrameworkAlternate="dotnet-uwp-10.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Runtime" ToVersion="5.0.0.0" FrameworkAlternate="net-5.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Runtime" ToVersion="6.0.0.0" FrameworkAlternate="net-6.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Runtime" ToVersion="7.0.0.0" FrameworkAlternate="net-7.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Runtime" ToVersion="8.0.0.0" FrameworkAlternate="net-8.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Runtime" ToVersion="9.0.0.0" FrameworkAlternate="net-9.0" />
<TypeForwarding From="System.Runtime" FromVersion="4.1.1.1" To="mscorlib" ToVersion="4.0.0.0" FrameworkAlternate="netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1" />
</TypeForwardingChain>
<TypeParameters>
<TypeParameter Name="T1">
<Attributes>
<Attribute FrameworkAlternate="net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(2)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(2)>]</AttributeName>
</Attribute>
</Attributes>
</TypeParameter>
<TypeParameter Name="T2">
<Attributes>
<Attribute FrameworkAlternate="net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(2)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(2)>]</AttributeName>
</Attribute>
</Attributes>
</TypeParameter>
<TypeParameter Name="T3">
<Attributes>
<Attribute FrameworkAlternate="net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(2)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(2)>]</AttributeName>
</Attribute>
</Attributes>
</TypeParameter>
</TypeParameters>
<Base>
<BaseTypeName>System.Object</BaseTypeName>
</Base>
<Interfaces>
<Interface>
<InterfaceName>System.Collections.IStructuralComparable</InterfaceName>
</Interface>
<Interface>
<InterfaceName>System.Collections.IStructuralEquatable</InterfaceName>
</Interface>
<Interface>
<InterfaceName>System.IComparable</InterfaceName>
</Interface>
<Interface FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-2.1">
<InterfaceName>System.Runtime.CompilerServices.ITuple</InterfaceName>
</Interface>
</Interfaces>
<Attributes>
<Attribute FrameworkAlternate="net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(0)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(0)>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.NullableContext(1)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.NullableContext(1)>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1">
<AttributeName Language="C#">[System.Serializable]</AttributeName>
<AttributeName Language="F#">[<System.Serializable>]</AttributeName>
</Attribute>
</Attributes>
<Docs>
<typeparam name="T1">The type of the tuple's first component.</typeparam>
<typeparam name="T2">The type of the tuple's second component.</typeparam>
<typeparam name="T3">The type of the tuple's third component.</typeparam>
<summary>Represents a 3-tuple, or triple.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
A tuple is a data structure that has a specific number and sequence of values. The <xref:System.Tuple%603> class represents a 3-tuple, or triple, which is a tuple that has three components.
You can instantiate a <xref:System.Tuple%603> object by calling either the <xref:System.Tuple%603.%23ctor%2A> constructor or the static <xref:System.Tuple.Create%60%603%28%60%600%2C%60%601%2C%60%602%29?displayProperty=nameWithType> method. You can retrieve the values of the tuple's components by using the read-only <xref:System.Tuple%603.Item1%2A>, <xref:System.Tuple%603.Item2%2A>, and <xref:System.Tuple%603.Item3%2A> instance properties.
Tuples are commonly used in four different ways:
- To represent a single set of data. For example, a tuple can represent a database record, and its components can represent individual fields of the record.
- To provide easy access to, and manipulation of, a data set. The following example defines an array of <xref:System.Tuple%603> objects that contain the names of students, their average test scores, and the number of tests taken. The array is passed to the `ComputeStatistics` method, which calculates the mean and standard deviation of the test scores.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3/Overview/example1.cs" interactive="try-dotnet" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3/Overview/example1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`3.class/vb/example1.vb" id="Snippet1":::
- To return multiple values from a method without the use of `out` parameters (in C#) or `ByRef` parameters (in Visual Basic). For example, the previous example returns its summary test score statistics in a <xref:System.Tuple%603> object.
- To pass multiple values to a method through a single parameter. For example, the <xref:System.Threading.Thread.Start%28System.Object%29?displayProperty=nameWithType> method has a single parameter that lets you supply one value to the method that the thread executes at startup. If you supply a <xref:System.Tuple%603> object as the method argument, you can supply the thread's startup routine with three items of data.
]]></format>
</remarks>
<altmember cref="T:System.Tuple" />
<altmember cref="T:System.Tuple`1" />
<altmember cref="T:System.Tuple`2" />
<altmember cref="T:System.Tuple`4" />
<altmember cref="T:System.Tuple`5" />
<altmember cref="T:System.Tuple`6" />
<altmember cref="T:System.Tuple`7" />
<altmember cref="T:System.Tuple`8" />
</Docs>
<Members>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="public Tuple (T1 item1, T2 item2, T3 item3);" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor(!T1 item1, !T2 item2, !T3 item3) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Tuple`3.#ctor(`0,`1,`2)" />
<MemberSignature Language="VB.NET" Value="Public Sub New (item1 As T1, item2 As T2, item3 As T3)" />
<MemberSignature Language="F#" Value="new Tuple<'T1, 'T2, 'T3> : 'T1 * 'T2 * 'T3 -> Tuple<'T1, 'T2, 'T3>" Usage="new System.Tuple<'T1, 'T2, 'T3> (item1, item2, item3)" />
<MemberSignature Language="C++ CLI" Value="public:
 Tuple(T1 item1, T2 item2, T3 item3);" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.0.20.0</AssemblyVersion>
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<AssemblyVersion>4.2.2.0</AssemblyVersion>
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<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<Parameters>
<Parameter Name="item1" Type="T1" />
<Parameter Name="item2" Type="T2" />
<Parameter Name="item3" Type="T3" />
</Parameters>
<Docs>
<param name="item1">The value of the tuple's first component.</param>
<param name="item2">The value of the tuple's second component.</param>
<param name="item3">The value of the tuple's third component.</param>
<summary>Initializes a new instance of the <see cref="T:System.Tuple`3" /> class.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can also use the static <xref:System.Tuple.Create%60%603%28%60%600%2C%60%601%2C%60%602%29?displayProperty=nameWithType> method to instantiate a 3-tuple object without having to explicitly specify the types of its components. The following example uses the <xref:System.Tuple.Create%60%603%28%60%600%2C%60%601%2C%60%602%29?displayProperty=nameWithType> method to instantiate a 3-tuple whose components are of type <xref:System.String>, <xref:System.Double>, and <xref:System.Double>.
:::code language="csharp" source="~/snippets/csharp/System/Tuple/Overview/create1.cs" id="Snippet5":::
:::code language="fsharp" source="~/snippets/fsharp/System/Tuple/Overview/create1.fs" id="Snippet5":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple.create/vb/create1.vb" id="Snippet5":::
This is equivalent to the following call to the <xref:System.Tuple%603.%23ctor%2A> class constructor.
:::code language="csharp" source="~/snippets/csharp/System/Tuple/Overview/create1.cs" id="Snippet6":::
:::code language="fsharp" source="~/snippets/fsharp/System/Tuple/Overview/create1.fs" id="Snippet6":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple.create/vb/create1.vb" id="Snippet6":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Equals">
<MemberSignature Language="C#" Value="public override bool Equals (object obj);" FrameworkAlternate="dotnet-uwp-10.0;netcore-1.0;netcore-1.1;netcore-2.0;netcore-2.1;netcore-2.2;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-1.0;netstandard-1.1;netstandard-1.2;netstandard-1.3;netstandard-1.4;netstandard-1.5;netstandard-1.6;netstandard-2.0;netstandard-2.1" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig virtual instance bool Equals(object obj) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Tuple`3.Equals(System.Object)" />
<MemberSignature Language="VB.NET" Value="Public Overrides Function Equals (obj As Object) As Boolean" />
<MemberSignature Language="F#" Value="override this.Equals : obj -> bool" Usage="tuple.Equals obj" />
<MemberSignature Language="C++ CLI" Value="public:
 override bool Equals(System::Object ^ obj);" />
<MemberSignature Language="C#" Value="public override bool Equals (object? obj);" FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-3.0;netcore-3.1" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
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<AssemblyVersion>4.0.20.0</AssemblyVersion>
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<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute FrameworkAlternate="net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.NullableContext(2)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.NullableContext(2)>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="obj" Type="System.Object">
<Attributes>
<Attribute FrameworkAlternate="net-6.0;net-7.0;net-8.0;net-9.0">
<AttributeName Language="C#">[System.Diagnostics.CodeAnalysis.NotNullWhen(true)]</AttributeName>
<AttributeName Language="F#">[<System.Diagnostics.CodeAnalysis.NotNullWhen(true)>]</AttributeName>
</Attribute>
</Attributes>
</Parameter>
</Parameters>
<Docs>
<param name="obj">The object to compare with this instance.</param>
<summary>Returns a value that indicates whether the current <see cref="T:System.Tuple`3" /> object is equal to a specified object.</summary>
<returns>
<see langword="true" /> if the current instance is equal to the specified object; otherwise, <see langword="false" />.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The `obj` parameter is considered to be equal to the current instance under the following conditions:
- It is a <xref:System.Tuple%603> object.
- Its three components are of the same types as the current instance.
- Its three components are equal to those of the current instance. Equality is determined by the default object equality comparer for each component.
## Examples
The following example calls the <xref:System.Tuple%603.Equals%28System.Object%29?displayProperty=nameWithType> method to determine whether any of the objects in an array of <xref:System.Tuple%603> objects are equal to one another. The output reflects the fact that the <xref:System.Tuple%603.Equals%28System.Object%29> method returns `true` when comparing <xref:System.Tuple%603> objects whose components have equal values.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3/Equals/equals1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3/Equals/equals1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`3.equals/vb/equals1.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="GetHashCode">
<MemberSignature Language="C#" Value="public override int GetHashCode ();" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig virtual instance int32 GetHashCode() cil managed" />
<MemberSignature Language="DocId" Value="M:System.Tuple`3.GetHashCode" />
<MemberSignature Language="VB.NET" Value="Public Overrides Function GetHashCode () As Integer" />
<MemberSignature Language="F#" Value="override this.GetHashCode : unit -> int" Usage="tuple.GetHashCode " />
<MemberSignature Language="C++ CLI" Value="public:
 override int GetHashCode();" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.0.20.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.2.0.0</AssemblyVersion>
<AssemblyVersion>4.2.1.0</AssemblyVersion>
<AssemblyVersion>4.2.2.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Returns the hash code for the current <see cref="T:System.Tuple`3" /> object.</summary>
<returns>A 32-bit signed integer hash code.</returns>
<remarks>To be added.</remarks>
</Docs>
</Member>
<Member MemberName="Item1">
<MemberSignature Language="C#" Value="public T1 Item1 { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance !T1 Item1" />
<MemberSignature Language="DocId" Value="P:System.Tuple`3.Item1" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property Item1 As T1" />
<MemberSignature Language="F#" Value="member this.Item1 : 'T1" Usage="System.Tuple<'T1, 'T2, 'T3>.Item1" />
<MemberSignature Language="C++ CLI" Value="public:
 property T1 Item1 { T1 get(); };" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.0.20.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.2.0.0</AssemblyVersion>
<AssemblyVersion>4.2.1.0</AssemblyVersion>
<AssemblyVersion>4.2.2.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>T1</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the value of the current <see cref="T:System.Tuple`3" /> object's first component.</summary>
<value>The value of the current <see cref="T:System.Tuple`3" /> object's first component.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can dynamically determine the type of the <xref:System.Tuple%603.Item1%2A> component in one of two ways:
- By calling the `GetType` method on the value that is returned by the <xref:System.Tuple%603.Item1%2A> property.
- By retrieving the <xref:System.Type> object that represents the <xref:System.Tuple%603> object, and retrieving the first element from the array that is returned by its <xref:System.Type.GetGenericArguments%2A?displayProperty=nameWithType> method.
## Examples
The following example defines an array of <xref:System.Tuple%603> objects that contain the names of students, their average test scores, and the number of tests taken. The array is passed to the `ComputeStatistics` method, which calculates the mean score, standard deviation, and number of cases from which the statistics are calculated. These values are stored in the <xref:System.Tuple%603> object that is returned by the `ComputeStatistics` method. The <xref:System.Tuple%603.Item1%2A> property contains the number of cases.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3/Overview/example1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3/Overview/example1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`3.class/vb/example1.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Item2">
<MemberSignature Language="C#" Value="public T2 Item2 { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance !T2 Item2" />
<MemberSignature Language="DocId" Value="P:System.Tuple`3.Item2" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property Item2 As T2" />
<MemberSignature Language="F#" Value="member this.Item2 : 'T2" Usage="System.Tuple<'T1, 'T2, 'T3>.Item2" />
<MemberSignature Language="C++ CLI" Value="public:
 property T2 Item2 { T2 get(); };" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.0.20.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
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<AssemblyVersion>4.2.2.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>T2</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the value of the current <see cref="T:System.Tuple`3" /> object's second component.</summary>
<value>The value of the current <see cref="T:System.Tuple`3" /> object's second component.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can dynamically determine the type of the <xref:System.Tuple%603.Item2%2A> component in one of two ways:
- By calling the `GetType` method on the value that is returned by the <xref:System.Tuple%603.Item2%2A> property.
- By retrieving the <xref:System.Type> object that represents the <xref:System.Tuple%603> object, and retrieving the second element from the array that is returned by its <xref:System.Type.GetGenericArguments%2A?displayProperty=nameWithType> method.
## Examples
The following example defines an array of <xref:System.Tuple%603> objects that contain the names of students, their average test scores, and the number of tests taken. The array is passed to the `ComputeStatistics` method, which calculates the mean score, standard deviation, and number of cases from which the statistics are calculated. These values are stored in the <xref:System.Tuple%603> object that is returned by the `ComputeStatistics` method. The <xref:System.Tuple%603.Item2%2A> property contains the mean test score.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3/Overview/example1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3/Overview/example1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`3.class/vb/example1.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Item3">
<MemberSignature Language="C#" Value="public T3 Item3 { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance !T3 Item3" />
<MemberSignature Language="DocId" Value="P:System.Tuple`3.Item3" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property Item3 As T3" />
<MemberSignature Language="F#" Value="member this.Item3 : 'T3" Usage="System.Tuple<'T1, 'T2, 'T3>.Item3" />
<MemberSignature Language="C++ CLI" Value="public:
 property T3 Item3 { T3 get(); };" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.0.20.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.2.0.0</AssemblyVersion>
<AssemblyVersion>4.2.1.0</AssemblyVersion>
<AssemblyVersion>4.2.2.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>T3</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the value of the current <see cref="T:System.Tuple`3" /> object's third component.</summary>
<value>The value of the current <see cref="T:System.Tuple`3" /> object's third component.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can dynamically determine the type of the <xref:System.Tuple%603.Item3%2A> component in one of two ways:
- By calling the `GetType` method on the value returned by the <xref:System.Tuple%603.Item3%2A> property.
- By retrieving the <xref:System.Type> object that represents the <xref:System.Tuple%603> object, and retrieving the third element from the array that is returned by its <xref:System.Type.GetGenericArguments%2A?displayProperty=nameWithType> method.
## Examples
The following example defines an array of <xref:System.Tuple%603> objects that contain the names of students, their average test scores, and the number of tests taken. The array is passed to the `ComputeStatistics` method, which calculates the mean score, standard deviation, and number of cases from which the statistics are calculated. These values are stored in the <xref:System.Tuple%603> object that is returned by the `ComputeStatistics` method. The <xref:System.Tuple%603.Item3%2A> property contains the standard deviation.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3/Overview/example1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3/Overview/example1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`3.class/vb/example1.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="System.Collections.IStructuralComparable.CompareTo">
<MemberSignature Language="C#" Value="int IStructuralComparable.CompareTo (object other, System.Collections.IComparer comparer);" />
<MemberSignature Language="ILAsm" Value=".method hidebysig newslot virtual instance int32 System.Collections.IStructuralComparable.CompareTo(object other, class System.Collections.IComparer comparer) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Tuple`3.System#Collections#IStructuralComparable#CompareTo(System.Object,System.Collections.IComparer)" />
<MemberSignature Language="VB.NET" Value="Function CompareTo (other As Object, comparer As IComparer) As Integer Implements IStructuralComparable.CompareTo" />
<MemberSignature Language="F#" Value="abstract member System.Collections.IStructuralComparable.CompareTo : obj * System.Collections.IComparer -> int
override this.System.Collections.IStructuralComparable.CompareTo : obj * System.Collections.IComparer -> int" Usage="tuple.System.Collections.IStructuralComparable.CompareTo (other, comparer)" />
<MemberSignature Language="C++ CLI" Value=" virtual int System.Collections.IStructuralComparable.CompareTo(System::Object ^ other, System::Collections::IComparer ^ comparer) = System::Collections::IStructuralComparable::CompareTo;" />
<MemberType>Method</MemberType>
<Implements>
<InterfaceMember>M:System.Collections.IStructuralComparable.CompareTo(System.Object,System.Collections.IComparer)</InterfaceMember>
</Implements>
<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.0.20.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.2.0.0</AssemblyVersion>
<AssemblyVersion>4.2.1.0</AssemblyVersion>
<AssemblyVersion>4.2.2.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="other" Type="System.Object" />
<Parameter Name="comparer" Type="System.Collections.IComparer" />
</Parameters>
<Docs>
<param name="other">An object to compare with the current instance.</param>
<param name="comparer">An object that provides custom rules for comparison.</param>
<summary>Compares the current <see cref="T:System.Tuple`3" /> object to a specified object by using a specified comparer, and returns an integer that indicates whether the current object is before, after, or in the same position as the specified object in the sort order.</summary>
<returns>A signed integer that indicates the relative position of this instance and <paramref name="other" /> in the sort order, as shown in the following table.
<list type="table"><listheader><term> Value
</term><description> Description
</description></listheader><item><term> A negative integer
</term><description> This instance precedes <paramref name="other" />.
</description></item><item><term> Zero
</term><description> This instance and <paramref name="other" /> have the same position in the sort order.
</description></item><item><term> A positive integer
</term><description> This instance follows <paramref name="other" />.
</description></item></list></returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This member is an explicit interface member implementation. It can be used only when the <xref:System.Tuple%603> instance is cast to an <xref:System.Collections.IStructuralComparable> interface.
Although this method can be called directly, it is most commonly called by collection sorting methods that include <xref:System.Collections.IComparer> parameters to order the members of a collection. For example, it is called by the <xref:System.Array.Sort%28System.Array%2CSystem.Collections.IComparer%29?displayProperty=nameWithType> method and the <xref:System.Collections.SortedList.Add%2A> method of a <xref:System.Collections.SortedList> object that is instantiated by using the <xref:System.Collections.SortedList.%23ctor%28System.Collections.IComparer%29?displayProperty=nameWithType> constructor.
> [!CAUTION]
> The <xref:System.Tuple%603.System%23Collections%23IStructuralComparable%23CompareTo%2A?displayProperty=nameWithType> method is intended for use in sorting operations. It should not be used when the primary purpose of a comparison is to determine whether two objects are equal. To determine whether two objects are equal, call the <xref:System.Tuple%603.System%23Collections%23IStructuralEquatable%23Equals%2A?displayProperty=nameWithType> method.
## Examples
The following example creates an array of <xref:System.Tuple%603> objects that consist of a student's name, mean test score, and number of tests. It displays the component of each tuple in the array in unsorted order, sorts the array, and then calls <xref:System.Tuple%603.ToString%2A> to display the value of each tuple in sorted order. To sort the array, the example defines a generic `ScoreComparer` class that implements the <xref:System.Collections.IComparer> interface and sorts the <xref:System.Tuple%603> objects in ascending order by the value of their second component rather than their first component. Note that the example does not directly call the <xref:System.Tuple%603.System%23Collections%23IStructuralComparable%23CompareTo%2A?displayProperty=nameWithType> method. This method is called implicitly by the <xref:System.Array.Sort%28System.Array%2CSystem.Collections.IComparer%29?displayProperty=nameWithType> method for each element in the array.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3/System.Collections.IStructuralComparable.CompareTo/compareto2.cs" interactive="try-dotnet" id="Snippet2":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3/System.Collections.IStructuralComparable.CompareTo/compareto2.fs" id="Snippet2":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`3.compareto/vb/compareto2.vb" id="Snippet2":::
]]></format>
</remarks>
<exception cref="T:System.ArgumentException">
<paramref name="other" /> is not a <see cref="T:System.Tuple`3" /> object.</exception>
<altmember cref="M:System.Tuple`3.System#Collections#IStructuralEquatable#Equals(System.Object,System.Collections.IEqualityComparer)" />
</Docs>
</Member>
<Member MemberName="System.Collections.IStructuralEquatable.Equals">
<MemberSignature Language="C#" Value="bool IStructuralEquatable.Equals (object other, System.Collections.IEqualityComparer comparer);" />
<MemberSignature Language="ILAsm" Value=".method hidebysig newslot virtual instance bool System.Collections.IStructuralEquatable.Equals(object other, class System.Collections.IEqualityComparer comparer) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Tuple`3.System#Collections#IStructuralEquatable#Equals(System.Object,System.Collections.IEqualityComparer)" />
<MemberSignature Language="VB.NET" Value="Function Equals (other As Object, comparer As IEqualityComparer) As Boolean Implements IStructuralEquatable.Equals" />
<MemberSignature Language="F#" Value="abstract member System.Collections.IStructuralEquatable.Equals : obj * System.Collections.IEqualityComparer -> bool
override this.System.Collections.IStructuralEquatable.Equals : obj * System.Collections.IEqualityComparer -> bool" Usage="tuple.System.Collections.IStructuralEquatable.Equals (other, comparer)" />
<MemberSignature Language="C++ CLI" Value=" virtual bool System.Collections.IStructuralEquatable.Equals(System::Object ^ other, System::Collections::IEqualityComparer ^ comparer) = System::Collections::IStructuralEquatable::Equals;" />
<MemberType>Method</MemberType>
<Implements>
<InterfaceMember>M:System.Collections.IStructuralEquatable.Equals(System.Object,System.Collections.IEqualityComparer)</InterfaceMember>
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<AssemblyInfo>
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<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
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<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
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<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Boolean</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="other" Type="System.Object">
<Attributes>
<Attribute FrameworkAlternate="net-6.0;net-7.0;net-8.0;net-9.0">
<AttributeName Language="C#">[System.Diagnostics.CodeAnalysis.NotNullWhen(true)]</AttributeName>
<AttributeName Language="F#">[<System.Diagnostics.CodeAnalysis.NotNullWhen(true)>]</AttributeName>
</Attribute>
</Attributes>
</Parameter>
<Parameter Name="comparer" Type="System.Collections.IEqualityComparer" />
</Parameters>
<Docs>
<param name="other">The object to compare with this instance.</param>
<param name="comparer">An object that defines the method to use to evaluate whether the two objects are equal.</param>
<summary>Returns a value that indicates whether the current <see cref="T:System.Tuple`3" /> object is equal to a specified object based on a specified comparison method.</summary>
<returns>
<see langword="true" /> if the current instance is equal to the specified object; otherwise, <see langword="false" />.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This member is an explicit interface member implementation. It can be used only when the <xref:System.Tuple%603> instance is cast to an <xref:System.Collections.IStructuralEquatable> interface.
The <xref:System.Collections.IEqualityComparer.Equals%2A?displayProperty=nameWithType> implementation is called only if `other` is not `null`, and if it can be successfully cast (in C#) or converted (in Visual Basic) to a <xref:System.Tuple%603> object whose components are of the same types as the current instance. The <xref:System.Tuple%603.System%23Collections%23IStructuralEquatable%23Equals%2A?displayProperty=nameWithType> method first passes the <xref:System.Tuple%603.Item1%2A> values of the <xref:System.Tuple%603> objects to be compared to the <xref:System.Collections.IEqualityComparer.Equals%2A?displayProperty=nameWithType> implementation. If this method call returns `true`, the method is called again and passed the <xref:System.Tuple%603.Item2%2A> values of the two <xref:System.Tuple%603> objects. If this method call returns `true` again, the method is called a third time and passed the <xref:System.Tuple%603.Item3%2A> values of the two <xref:System.Tuple%603> objects.
## Examples
The following example defines an `Item2Comparer` class that implements the <xref:System.Collections.IEqualityComparer> interface and changes the way in which <xref:System.Tuple%603> objects are evaluated for equality. The method always returns `true` when it is passed the <xref:System.Tuple%603.Item1%2A> property values of two <xref:System.Tuple%603> objects, and it calls the <xref:System.Tuple%603.System%23Collections%23IStructuralEquatable%23Equals%2A?displayProperty=nameWithType> method to evaluate their <xref:System.Tuple%603.Item2%2A> property values. If this method call returns `true`, their <xref:System.Tuple%603.Item3%2A> property values are passed to the method, which always returns `true`. As a result, the method tests for equality based only on the value of the <xref:System.Tuple%603.Item2%2A> property. The output illustrates the result for a data set of <xref:System.Tuple%603> objects that record the names, mean test score, and number of tests of students in a class.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3/Equals/equals2.cs" interactive="try-dotnet" id="Snippet2":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3/Equals/equals2.fs" id="Snippet2":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`3.equals/vb/equals2.vb" id="Snippet2":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="System.Collections.IStructuralEquatable.GetHashCode">
<MemberSignature Language="C#" Value="int IStructuralEquatable.GetHashCode (System.Collections.IEqualityComparer comparer);" />
<MemberSignature Language="ILAsm" Value=".method hidebysig newslot virtual instance int32 System.Collections.IStructuralEquatable.GetHashCode(class System.Collections.IEqualityComparer comparer) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Tuple`3.System#Collections#IStructuralEquatable#GetHashCode(System.Collections.IEqualityComparer)" />
<MemberSignature Language="VB.NET" Value="Function GetHashCode (comparer As IEqualityComparer) As Integer Implements IStructuralEquatable.GetHashCode" />
<MemberSignature Language="F#" Value="abstract member System.Collections.IStructuralEquatable.GetHashCode : System.Collections.IEqualityComparer -> int
override this.System.Collections.IStructuralEquatable.GetHashCode : System.Collections.IEqualityComparer -> int" Usage="tuple.System.Collections.IStructuralEquatable.GetHashCode comparer" />
<MemberSignature Language="C++ CLI" Value=" virtual int System.Collections.IStructuralEquatable.GetHashCode(System::Collections::IEqualityComparer ^ comparer) = System::Collections::IStructuralEquatable::GetHashCode;" />
<MemberType>Method</MemberType>
<Implements>
<InterfaceMember>M:System.Collections.IStructuralEquatable.GetHashCode(System.Collections.IEqualityComparer)</InterfaceMember>
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<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.0.20.0</AssemblyVersion>
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<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
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<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
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<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="comparer" Type="System.Collections.IEqualityComparer" />
</Parameters>
<Docs>
<param name="comparer">An object whose <see cref="M:System.Collections.IEqualityComparer.GetHashCode(System.Object)" /> method calculates the hash code of the current <see cref="T:System.Tuple`3" /> object.</param>
<summary>Calculates the hash code for the current <see cref="T:System.Tuple`3" /> object by using a specified computation method.</summary>
<returns>A 32-bit signed integer hash code.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This member is an explicit interface member implementation. It can be used only when the <xref:System.Tuple%603> instance is cast to an <xref:System.Collections.IStructuralEquatable> interface.
The method simply wraps a call to the `comparer` object's <xref:System.Collections.IEqualityComparer.GetHashCode%2A?displayProperty=nameWithType> implementation.
The algorithm used to compute the hash code should return the same hash code for two <xref:System.Tuple%603> objects that are considered to be equal.
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="System.IComparable.CompareTo">
<MemberSignature Language="C#" Value="int IComparable.CompareTo (object obj);" />
<MemberSignature Language="ILAsm" Value=".method hidebysig newslot virtual instance int32 System.IComparable.CompareTo(object obj) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Tuple`3.System#IComparable#CompareTo(System.Object)" />
<MemberSignature Language="VB.NET" Value="Function CompareTo (obj As Object) As Integer Implements IComparable.CompareTo" />
<MemberSignature Language="F#" Value="abstract member System.IComparable.CompareTo : obj -> int
override this.System.IComparable.CompareTo : obj -> int" Usage="tuple.System.IComparable.CompareTo obj" />
<MemberSignature Language="C++ CLI" Value=" virtual int System.IComparable.CompareTo(System::Object ^ obj) = IComparable::CompareTo;" />
<MemberType>Method</MemberType>
<Implements>
<InterfaceMember>M:System.IComparable.CompareTo(System.Object)</InterfaceMember>
</Implements>
<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.0.20.0</AssemblyVersion>
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<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
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<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
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<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Parameters>
<Parameter Name="obj" Type="System.Object" />
</Parameters>
<Docs>
<param name="obj">An object to compare with the current instance.</param>
<summary>Compares the current <see cref="T:System.Tuple`3" /> object to a specified object and returns an integer that indicates whether the current object is before, after, or in the same position as the specified object in the sort order.</summary>
<returns>A signed integer that indicates the relative position of this instance and <paramref name="obj" /> in the sort order, as shown in the following table.
<list type="table"><listheader><term> Value
</term><description> Description
</description></listheader><item><term> A negative integer
</term><description> This instance precedes <paramref name="obj" />.
</description></item><item><term> Zero
</term><description> This instance and <paramref name="obj" /> have the same position in the sort order.
</description></item><item><term> A positive integer
</term><description> This instance follows <paramref name="obj" />.
</description></item></list></returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
This member is an explicit interface member implementation. It can be used only when the <xref:System.Tuple%603> instance is cast to an <xref:System.IComparable> interface.
This method provides the <xref:System.IComparable.CompareTo%2A?displayProperty=nameWithType> implementation for the <xref:System.Tuple%603> class. Although the method can be called directly, it is most commonly called by the default overloads of collection sorting methods, such as <xref:System.Array.Sort%28System.Array%29?displayProperty=nameWithType> and <xref:System.Collections.SortedList.Add%2A?displayProperty=nameWithType>, to order the members of a collection.
> [!CAUTION]
> The <xref:System.Tuple%603.System%23IComparable%23CompareTo%2A?displayProperty=nameWithType> method is intended for use in sorting operations. It should not be used when the primary purpose of a comparison is to determine whether two objects are equal. To determine whether two objects are equal, call the <xref:System.Tuple%603.Equals%2A> method.
The <xref:System.Tuple%603.System%23IComparable%23CompareTo%2A?displayProperty=nameWithType> method uses the default object comparer to compare each component.
## Examples
The following example creates an array of <xref:System.Tuple%603> objects whose components consist of a student's name, mean test score, and number of tests. It displays the components of each tuple in the array in unsorted order, sorts the array, and then calls <xref:System.Tuple%603.ToString%2A> to display each tuple in sorted order. The output shows that the array has been sorted by its first component. Note that the example does not directly call the <xref:System.Tuple%603.System%23IComparable%23CompareTo%2A?displayProperty=nameWithType> method. This method is called implicitly by the <xref:System.Array.Sort%28System.Array%29> method for each element in the array.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3/System.Collections.IStructuralComparable.CompareTo/compareto1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3/System.Collections.IStructuralComparable.CompareTo/compareto1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`3.compareto/vb/compareto1.vb" id="Snippet1":::
]]></format>
</remarks>
<exception cref="T:System.ArgumentException">
<paramref name="obj" /> is not a <see cref="T:System.Tuple`3" /> object.</exception>
<altmember cref="M:System.Tuple`3.Equals(System.Object)" />
</Docs>
</Member>
<Member MemberName="System.Runtime.CompilerServices.ITuple.Item">
<MemberSignature Language="C#" Value="object? System.Runtime.CompilerServices.ITuple.Item[int index] { get; }" FrameworkAlternate="net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-3.0;netcore-3.1" />
<MemberSignature Language="ILAsm" Value=".property instance object System.Runtime.CompilerServices.ITuple.Item(int32)" />
<MemberSignature Language="DocId" Value="P:System.Tuple`3.System#Runtime#CompilerServices#ITuple#Item(System.Int32)" />
<MemberSignature Language="VB.NET" Value=" ReadOnly Property Item(index As Integer) As Object Implements ITuple.Item" />
<MemberSignature Language="F#" Value="member this.System.Runtime.CompilerServices.ITuple.Item(int) : obj" Usage="System.Runtime.CompilerServices.ITuple.Item" />
<MemberSignature Language="C++ CLI" Value="property System::Object ^ System::Runtime::CompilerServices::ITuple::Item[int] { System::Object ^ get(int index); };" />
<MemberSignature Language="C#" Value="object System.Runtime.CompilerServices.ITuple.Item[int index] { get; }" FrameworkAlternate="netcore-2.0;netcore-2.1;netcore-2.2;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netframework-4.8.1;netstandard-2.1" />
<MemberType>Property</MemberType>
<Implements>
<InterfaceMember>P:System.Runtime.CompilerServices.ITuple.Item(System.Int32)</InterfaceMember>
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<Attributes>
<Attribute FrameworkAlternate="net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(2)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(2)>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Object</ReturnType>
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<Parameters>
<Parameter Name="index" Type="System.Int32" Index="0" FrameworkAlternate="netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netframework-4.7.1;netframework-4.7.2;netframework-4.8;netstandard-2.1;netcore-3.1;net-5.0;net-6.0;net-7.0;netframework-4.8.1;net-8.0;net-9.0" />
</Parameters>
<Docs>
<param name="index">The index of the specified <see langword="Tuple" /> element. <paramref name="index" /> can range from 0 to 2.</param>
<summary>Gets the value of the specified <see langword="Tuple" /> element.</summary>
<value>The value of the <see langword="Tuple" /> element at the specified position.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Tuple%603.System%23Runtime%23CompilerServices%23ITuple%23Item%2A?displayProperty=nameWithType> property is an explicit interface implementation. To call it, you must cast or convert the <xref:System.Tuple%603> object to an <xref:System.Runtime.CompilerServices.ITuple> interface object.
]]></format>
</remarks>
<exception cref="T:System.IndexOutOfRangeException">
<paramref name="index" /> is less than 0 or greater than 2.</exception>
</Docs>
</Member>
<Member MemberName="System.Runtime.CompilerServices.ITuple.Length">
<MemberSignature Language="C#" Value="int System.Runtime.CompilerServices.ITuple.Length { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance int32 System.Runtime.CompilerServices.ITuple.Length" />
<MemberSignature Language="DocId" Value="P:System.Tuple`3.System#Runtime#CompilerServices#ITuple#Length" />
<MemberSignature Language="VB.NET" Value=" ReadOnly Property Length As Integer Implements ITuple.Length" />
<MemberSignature Language="F#" Value="member this.System.Runtime.CompilerServices.ITuple.Length : int" Usage="System.Runtime.CompilerServices.ITuple.Length" />
<MemberSignature Language="C++ CLI" Value="property int System::Runtime::CompilerServices::ITuple::Length { int get(); };" />
<MemberType>Property</MemberType>
<Implements>
<InterfaceMember>P:System.Runtime.CompilerServices.ITuple.Length</InterfaceMember>
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<AssemblyInfo>
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<AssemblyInfo>
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<ReturnValue>
<ReturnType>System.Int32</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the number of elements in the <see langword="Tuple" />.</summary>
<value>3, the number of elements in a <see cref="T:System.Tuple`3" /> object.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Tuple%603.System%23Runtime%23CompilerServices%23ITuple%23Length%2A> property is an explicit interface implementation. To call it, you must cast or convert the <xref:System.Tuple%603> object to an <xref:System.Runtime.CompilerServices.ITuple> interface object.
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="ToString">
<MemberSignature Language="C#" Value="public override string ToString ();" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig virtual instance string ToString() cil managed" />
<MemberSignature Language="DocId" Value="M:System.Tuple`3.ToString" />
<MemberSignature Language="VB.NET" Value="Public Overrides Function ToString () As String" />
<MemberSignature Language="F#" Value="override this.ToString : unit -> string" Usage="tuple.ToString " />
<MemberSignature Language="C++ CLI" Value="public:
 override System::String ^ ToString();" />
<MemberType>Method</MemberType>
<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.0.20.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.2.0.0</AssemblyVersion>
<AssemblyVersion>4.2.1.0</AssemblyVersion>
<AssemblyVersion>4.2.2.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>mscorlib</AssemblyName>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
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<ReturnValue>
<ReturnType>System.String</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Returns a string that represents the value of this <see cref="T:System.Tuple`3" /> instance.</summary>
<returns>The string representation of this <see cref="T:System.Tuple`3" /> object.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The string returned by this method takes the form (*Item1*, *Item2*, *Item3*), where *Item1*, *Item2*, and *Item3* represent the values of the <xref:System.Tuple%603.Item1%2A>, <xref:System.Tuple%603.Item2%2A>, and <xref:System.Tuple%603.Item3%2A> properties, respectively. If any of the property values is `null`, it is represented as <xref:System.String.Empty?displayProperty=nameWithType>.
## Examples
The following example illustrates the <xref:System.Tuple%603.ToString%2A> method.