/
Tuple`8.xml
1410 lines (1249 loc) · 93.8 KB
/
Tuple`8.xml
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<Type Name="Tuple<T1,T2,T3,T4,T5,T6,T7,TRest>" FullName="System.Tuple<T1,T2,T3,T4,T5,T6,T7,TRest>">
<TypeSignature Language="C#" Value="public class Tuple<T1,T2,T3,T4,T5,T6,T7,TRest> : 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`8<T1, T2, T3, T4, T5, T6, T7, TRest> 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`8" />
<TypeSignature Language="VB.NET" Value="Public Class Tuple(Of T1, T2, T3, T4, T5, T6, T7, TRest)
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, 'T4, 'T5, 'T6, 'T7, 'Rest> = class
 interface IStructuralComparable
 interface IStructuralEquatable
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<TypeSignature Language="C++ CLI" Value="generic <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename TRest>
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,T4,T5,T6,T7,TRest> : 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`8<T1, T2, T3, T4, T5, T6, T7, TRest> 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, T4, T5, T6, T7, TRest)
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, 'T4, 'T5, 'T6, 'T7, 'Rest> = 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, typename T4, typename T5, typename T6, typename T7, typename TRest>
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`8<T1, T2, T3, T4, T5, T6, T7, TRest> 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, 'T4, 'T5, 'T6, 'T7, 'Rest> = 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`8<T1, T2, T3, T4, T5, T6, T7, TRest> 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, 'T4, 'T5, 'T6, 'T7, 'Rest> = 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" />
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<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>
<TypeParameter Name="T4">
<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="T5">
<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="T6">
<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>
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<TypeParameter Name="T7">
<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="TRest" />
</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>
<typeparam name="T4">The type of the tuple's fourth component.</typeparam>
<typeparam name="T5">The type of the tuple's fifth component.</typeparam>
<typeparam name="T6">The type of the tuple's sixth component.</typeparam>
<typeparam name="T7">The type of the tuple's seventh component.</typeparam>
<typeparam name="TRest">Any generic <see langword="Tuple" /> object that defines the types of the tuple's remaining components.</typeparam>
<summary>Represents an *n*-tuple, where *n* is 8 or greater.</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%608> class represents an *n*-tuple that has eight or more components.
You can instantiate a <xref:System.Tuple%608> object with exactly eight components by calling the static <xref:System.Tuple.Create%2A?displayProperty=nameWithType> method. The following example creates an 8-tuple (octuple) that contains prime numbers that are less than 20. Note that it uses type inference to determine the type of each component.
:::code language="csharp" source="~/snippets/csharp/System/Tuple/Overview/createntuple.cs" interactive="try-dotnet-method" id="Snippet17":::
:::code language="fsharp" source="~/snippets/fsharp/System/Tuple/Overview/createntuple.fs" id="Snippet17":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple.create/vb/createntuple.vb" id="Snippet17":::
You can also instantiate an n-tuple object with eight or more components by calling the <xref:System.Tuple%608.%23ctor%2A> constructor. The following example uses the <xref:System.Tuple%608.%23ctor%2A> constructor to create an 8-tuple that is equivalent to the tuple created in the previous example.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Overview/octuple1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Overview/octuple1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.class/vb/octuple1.vb" id="Snippet1":::
> [!NOTE]
> To create an n-tuple with nine or more components, you must call the <xref:System.Tuple%608.%23ctor%2A> constructor. The static factory methods of the <xref:System.Tuple> class do not support the creation of `Tuple` objects with more than eight components.
To instantiate an n-tuple that has eight or more components with the <xref:System.Tuple%608.%23ctor%2A> constructor, you supply a generic `Tuple` object as the `rest` parameter to define the eighth through *n*th components of the tuple. By nesting generic `Tuple` objects in this way, you can create a tuple that has no practical limitation on the number of its components.
The following example creates a 17-tuple that contains population data for the city of Detroit, Michigan, for each national census from 1860 to 2000. The first component of the tuple is the city name. The second component is the start date of the data series, and the third component is the population at the start date. Each subsequent component provides the population at decade intervals. The 17-tuple is created by nesting a <xref:System.Tuple%603> object inside a <xref:System.Tuple%608> object. (That is, the <xref:System.Tuple%603> object is supplied as the value of the `rest` parameter in the <xref:System.Tuple%608> class constructor.) This <xref:System.Tuple%608> object is, in turn, nested in an outer <xref:System.Tuple%608> object. (That is, the <xref:System.Tuple%608> object is supplied as the value of the `rest` parameter in the outer <xref:System.Tuple%608> object's class constructor.)
:::code language="csharp" source="~/snippets/csharp/System/Tuple/Overview/example.cs" id="Snippet19":::
:::code language="fsharp" source="~/snippets/fsharp/System/Tuple/Overview/example.fs" id="Snippet19":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple.create/vb/example.vb" id="Snippet19":::
You can retrieve the value of the tuple's first seven components by using the read-only <xref:System.Tuple%607.Item1%2A>, <xref:System.Tuple%607.Item2%2A>, <xref:System.Tuple%607.Item3%2A>, <xref:System.Tuple%607.Item4%2A>, <xref:System.Tuple%607.Item5%2A>, <xref:System.Tuple%607.Item6%2A>, and <xref:System.Tuple%607.Item7%2A> instance properties. Any additional components are nested and can be retrieved from the <xref:System.Tuple%608.Rest%2A> property. In the previous example, the <xref:System.Tuple%608.Item1%2A> through <xref:System.Tuple%608.Item7%2A> properties retrieve the first through seventh components of the tuple. The eighth through fourteenth components are contained in the tuple that is nested at the second level, and are represented by the `Rest.Item1` through `Rest.Item7` properties. The fifteenth through seventeenth components are contained in the tuple that is nested at the third level, and are represented by the `Rest.Rest.Item1` though `Rest.Rest.Item3` 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.
- 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 computed statistics, along with the city name, in a <xref:System.Tuple%607> 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%607> object as the method argument, you can supply the thread's startup routine with seven items of data.
]]></format>
</remarks>
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<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>
<param name="item4">The value of the tuple's fourth component.</param>
<param name="item5">The value of the tuple's fifth component.</param>
<param name="item6">The value of the tuple's sixth component.</param>
<param name="item7">The value of the tuple's seventh component.</param>
<param name="rest">Any generic <see langword="Tuple" /> object that contains the values of the tuple's remaining components.</param>
<summary>Initializes a new instance of the <see cref="T:System.Tuple`8" /> class.</summary>
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<format type="text/markdown"><![CDATA[
## Remarks
You can also use the static <xref:System.Tuple.Create%2A?displayProperty=nameWithType> method to instantiate an 8-tuple (octuple) object without having to explicitly specify the types of its components. The following example uses the <xref:System.Tuple.Create%2A?displayProperty=nameWithType> method to instantiate an 8-tuple object that contains prime numbers that are less than 20.
:::code language="csharp" source="~/snippets/csharp/System/Tuple/Overview/createntuple.cs" id="Snippet17":::
:::code language="fsharp" source="~/snippets/fsharp/System/Tuple/Overview/createntuple.fs" id="Snippet17":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple.create/vb/createntuple.vb" id="Snippet17":::
This is equivalent to the following call to the <xref:System.Tuple%607.%23ctor%2A> class constructor.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Overview/octuple1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Overview/octuple1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.class/vb/octuple1.vb" id="Snippet1":::
However, the static <xref:System.Tuple.Create%2A?displayProperty=nameWithType> method cannot be used to create a tuple object with more than eight components.
When using the <xref:System.Tuple%608.%23ctor%2A> constructor to create an n-tuple with eight or more components, you use the `rest` parameter to create a nested n-tuple that has from one to seven components. By using successive levels of nesting, you can create an n-tuple that has a virtually unlimited number of components. For example, to create a 25-tuple, you instantiate a <xref:System.Tuple%608> object with three levels of nesting, as follows:
- The outermost <xref:System.Tuple%608> object contains the first through seventh components. Its <xref:System.Tuple%608.Rest%2A> property provides access to an <xref:System.Tuple%608> object at the first level of nesting.
- The outermost nested <xref:System.Tuple%608> object contains the eighth through fourteenth components, and its <xref:System.Tuple%608.Rest%2A> property provides access to an <xref:System.Tuple%608> object at the second level of nesting.
- The <xref:System.Tuple%608> object at the second level of nesting contains the fifteenth through twenty-first components, and its <xref:System.Tuple%608.Rest%2A> property provides access to an <xref:System.Tuple%604> object at the third level of nesting.
- The innermost tuple is a <xref:System.Tuple%604> object that contains the twenty-second through twenty-fifth components.
## Examples
The following example creates a 17-tuple that contains population data for the city of Detroit, Michigan, for each census from 1860 to 2000. The first component of the tuple is the city name. The second component is the start date of the series of data, and the third component is the population at the start date. Each subsequent component provides the population at decade intervals. The example uses two layers of nesting to create the 17-tuple: It defines a 7-tuple whose third through seventh components contain population data for 1860 through 1900, a nested 7-tuple that contains population data for 1910 through 1970, and an inner nested 3-tuple that contains population data for 1980 through 2000.
:::code language="csharp" source="~/snippets/csharp/System/Tuple/Overview/example.cs" id="Snippet19":::
:::code language="fsharp" source="~/snippets/fsharp/System/Tuple/Overview/example.fs" id="Snippet19":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple.create/vb/example.vb" id="Snippet19":::
]]></format>
</remarks>
<exception cref="T:System.ArgumentException">
<paramref name="rest" /> is not a generic <see langword="Tuple" /> object.</exception>
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<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`8" /> object is equal to a specified object.</summary>
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<see langword="true" /> if the current instance is equal to the specified object; otherwise, <see langword="false" />.</returns>
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<format type="text/markdown"><![CDATA[
## Remarks
The `obj` parameter is considered to be equal to the current instance if it meets all the following conditions:
- It is a <xref:System.Tuple%608> object.
- It has the same total number of components that are of the same types as the current instance.
- Its components (including its nested components) are equal to those of the current instance. Equality is determined by the default equality comparer for each component.
## Examples
The following example defines five <xref:System.Tuple%608> objects that contain prime numbers. It then compares the first object with each of the remaining objects. As the output shows, only the first and the last <xref:System.Tuple%608> objects are equal, because they have an identical number of components with identical values.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Equals/equals1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Equals/equals1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.equals/vb/equals1.vb" id="Snippet1":::
]]></format>
</remarks>
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<returns>A 32-bit signed integer hash code.</returns>
<remarks>To be added.</remarks>
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<value>The value of the current <see cref="T:System.Tuple`8" /> object's first component.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can dynamically determine the type of the <xref:System.Tuple%608.Item1%2A> component in one of two ways:
- By calling the `GetType` method on the value that is returned by the <xref:System.Tuple%608.Item1%2A> property.
- By retrieving the <xref:System.Type> object that represents the <xref:System.Tuple%608> 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 creates a 17-tuple object that contains population data for the city of Detroit, Michigan, from 1860 to 2000. The first component of the 17-tuple is the city name. The example uses the <xref:System.Tuple%608.Item1%2A> property to display the city name in the table header before displaying the population data.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.item1/vb/item1.vb" id="Snippet1":::
]]></format>
</remarks>
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<MemberSignature Language="ILAsm" Value=".property instance !T2 Item2" />
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<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, 'T4, 'T5, 'T6, 'T7, 'Rest>.Item2" />
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<summary>Gets the value of the current <see cref="T:System.Tuple`8" /> object's second component.</summary>
<value>The value of the current <see cref="T:System.Tuple`8" /> object's second component.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can dynamically determine the type of the <xref:System.Tuple%608.Item2%2A> component in one of two ways:
- By calling the `GetType` method on the value that is returned by the <xref:System.Tuple%608.Item2%2A> property.
- By retrieving the <xref:System.Type> object that represents the <xref:System.Tuple%608> 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 creates a 17-tuple object that contains population data for the city of Detroit, Michigan, from 1860 to 2000. The second component of the 17-tuple is the first year of the data series. The example assigns the value of the <xref:System.Tuple%608.Item2%2A> property to a variable, and then uses that variable to represent the year whose data is displayed.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.item1/vb/item1.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
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<MemberSignature Language="C#" Value="public T3 Item3 { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance !T3 Item3" />
<MemberSignature Language="DocId" Value="P:System.Tuple`8.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, 'T4, 'T5, 'T6, 'T7, 'Rest>.Item3" />
<MemberSignature Language="C++ CLI" Value="public:
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<MemberType>Property</MemberType>
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<summary>Gets the value of the current <see cref="T:System.Tuple`8" /> object's third component.</summary>
<value>The value of the current <see cref="T:System.Tuple`8" /> object's third component.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can dynamically determine the type of the <xref:System.Tuple%608.Item3%2A> component in one of two ways:
- By calling the `GetType` method on the value that is returned by the <xref:System.Tuple%608.Item3%2A> property.
- By retrieving the <xref:System.Type> object that represents the <xref:System.Tuple%608> 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 creates a 17-tuple object that contains population data for the city of Detroit, Michigan, from 1860 to 2000. The third component of the 17-tuple is the population in 1860. The example uses the <xref:System.Tuple%608.Item3%2A> property to display the population value and to calculate the annual rate of population change between 1860 and 1870.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.item1/vb/item1.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
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<MemberSignature Language="ILAsm" Value=".property instance !T4 Item4" />
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<MemberSignature Language="VB.NET" Value="Public ReadOnly Property Item4 As T4" />
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<MemberType>Property</MemberType>
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<ReturnValue>
<ReturnType>T4</ReturnType>
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<summary>Gets the value of the current <see cref="T:System.Tuple`8" /> object's fourth component.</summary>
<value>The value of the current <see cref="T:System.Tuple`8" /> object's fourth component.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can dynamically determine the type of the <xref:System.Tuple%608.Item4%2A> component in one of two ways:
- By calling the `GetType` method on the value that is returned by the <xref:System.Tuple%608.Item4%2A> property.
- By retrieving the <xref:System.Type> object that represents the <xref:System.Tuple%608> object, and retrieving the fourth element from the array that is returned by its <xref:System.Type.GetGenericArguments%2A?displayProperty=nameWithType> method.
## Examples
The following example creates a 17-tuple object that contains population data for the city of Detroit, Michigan, from 1860 to 2000. The fourth component of the 17-tuple is the population in 1870. The example uses the <xref:System.Tuple%608.Item4%2A> property to display the population value and to calculate the annual rate of population change between 1870 and 1880.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.item1/vb/item1.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
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<MemberSignature Language="ILAsm" Value=".property instance !T5 Item5" />
<MemberSignature Language="DocId" Value="P:System.Tuple`8.Item5" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property Item5 As T5" />
<MemberSignature Language="F#" Value="member this.Item5 : 'T5" Usage="System.Tuple<'T1, 'T2, 'T3, 'T4, 'T5, 'T6, 'T7, 'Rest>.Item5" />
<MemberSignature Language="C++ CLI" Value="public:
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<MemberType>Property</MemberType>
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<summary>Gets the value of the current <see cref="T:System.Tuple`8" /> object's fifth component.</summary>
<value>The value of the current <see cref="T:System.Tuple`8" /> object's fifth component.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can dynamically determine the type of the <xref:System.Tuple%608.Item5%2A> component in one of two ways:
- By calling the `GetType` method on the value that is returned by the <xref:System.Tuple%608.Item5%2A> property.
- By retrieving the <xref:System.Type> object that represents the <xref:System.Tuple%608> object, and retrieving the fifth element from the array that is returned by its <xref:System.Type.GetGenericArguments%2A?displayProperty=nameWithType> method.
## Examples
The following example creates a 17-tuple object that contains population data for the city of Detroit, Michigan, from 1860 to 2000. The fifth component of the 17-tuple is the population in 1880. The example uses the <xref:System.Tuple%608.Item5%2A> property to display the population value and to calculate the annual rate of population change between 1880 and 1890.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.item1/vb/item1.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
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<Member MemberName="Item6">
<MemberSignature Language="C#" Value="public T6 Item6 { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance !T6 Item6" />
<MemberSignature Language="DocId" Value="P:System.Tuple`8.Item6" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property Item6 As T6" />
<MemberSignature Language="F#" Value="member this.Item6 : 'T6" Usage="System.Tuple<'T1, 'T2, 'T3, 'T4, 'T5, 'T6, 'T7, 'Rest>.Item6" />
<MemberSignature Language="C++ CLI" Value="public:
 property T6 Item6 { T6 get(); };" />
<MemberType>Property</MemberType>
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<AssemblyVersion>7.0.0.0</AssemblyVersion>
<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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<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
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<ReturnValue>
<ReturnType>T6</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the value of the current <see cref="T:System.Tuple`8" /> object's sixth component.</summary>
<value>The value of the current <see cref="T:System.Tuple`8" /> object's sixth component.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can dynamically determine the type of the <xref:System.Tuple%608.Item6%2A> component in one of two ways:
- By calling the `GetType` method on the value that is returned by the <xref:System.Tuple%608.Item6%2A> property.
- By retrieving the <xref:System.Type> object that represents the <xref:System.Tuple%608> object, and retrieving the sixth element from the array that is returned by its <xref:System.Type.GetGenericArguments%2A?displayProperty=nameWithType> method.
## Examples
The following example creates a 17-tuple object that contains population data for the city of Detroit, Michigan, from 1860 to 2000. The sixth component of the 17-tuple is the population in 1890. The example uses the <xref:System.Tuple%608.Item6%2A> property to display the population value and to calculate the annual rate of population change between 1890 and 1900.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.item1/vb/item1.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
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<Member MemberName="Item7">
<MemberSignature Language="C#" Value="public T7 Item7 { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance !T7 Item7" />
<MemberSignature Language="DocId" Value="P:System.Tuple`8.Item7" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property Item7 As T7" />
<MemberSignature Language="F#" Value="member this.Item7 : 'T7" Usage="System.Tuple<'T1, 'T2, 'T3, 'T4, 'T5, 'T6, 'T7, 'Rest>.Item7" />
<MemberSignature Language="C++ CLI" Value="public:
 property T7 Item7 { T7 get(); };" />
<MemberType>Property</MemberType>
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<AssemblyVersion>7.0.0.0</AssemblyVersion>
<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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<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
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<ReturnValue>
<ReturnType>T7</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets the value of the current <see cref="T:System.Tuple`8" /> object's seventh component.</summary>
<value>The value of the current <see cref="T:System.Tuple`8" /> object's seventh component.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
You can dynamically determine the type of the <xref:System.Tuple%608.Item7%2A> component in one of two ways:
- By calling the `GetType` method on the value that is returned by the <xref:System.Tuple%608.Item7%2A> property.
- By retrieving the <xref:System.Type> object that represents the <xref:System.Tuple%608> object, and retrieving the seventh element from the array that is returned by its <xref:System.Type.GetGenericArguments%2A?displayProperty=nameWithType> method.
## Examples
The following example creates a 17-tuple object that contains population data for the city of Detroit, Michigan, from 1860 to 2000. The seventh component of the 17-tuple is the population in 1900. The example uses the <xref:System.Tuple%608.Item7%2A> property to display the population value and to calculate the annual rate of population change between 1900 and 1910.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.item1/vb/item1.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="Rest">
<MemberSignature Language="C#" Value="public TRest Rest { get; }" />
<MemberSignature Language="ILAsm" Value=".property instance !TRest Rest" />
<MemberSignature Language="DocId" Value="P:System.Tuple`8.Rest" />
<MemberSignature Language="VB.NET" Value="Public ReadOnly Property Rest As TRest" />
<MemberSignature Language="F#" Value="member this.Rest : 'Rest" Usage="System.Tuple<'T1, 'T2, 'T3, 'T4, 'T5, 'T6, 'T7, 'Rest>.Rest" />
<MemberSignature Language="C++ CLI" Value="public:
 property TRest Rest { TRest get(); };" />
<MemberType>Property</MemberType>
<AssemblyInfo>
<AssemblyName>System.Runtime</AssemblyName>
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<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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<AssemblyVersion>2.0.0.0</AssemblyVersion>
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<ReturnValue>
<ReturnType>TRest</ReturnType>
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<Docs>
<summary>Gets the current <see cref="T:System.Tuple`8" /> object's remaining components.</summary>
<value>The value of the current <see cref="T:System.Tuple`8" /> object's remaining components.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Tuple%608.Rest%2A> property returns a nested `Tuple` object that allows access to the eighth though *n*th components of the tuple. Depending on the total number of components in the tuple, the values of the eighth through fourteenth components can be retrieved from the nested `Tuple` object's <xref:System.Tuple%608.Item1%2A> through <xref:System.Tuple%608.Item7%2A> properties. You can then use the <xref:System.Tuple%608.Rest%2A> property of a nested <xref:System.Tuple%608> object to retrieve the `Tuple` object at the next level of nesting.
You can dynamically determine the number of components in a nested `Tuple` object that is returned by the <xref:System.Tuple%608.Rest%2A> property by extracting the digit from its type name. The following example provides an illustration.
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.item1/vb/rest.vb" id="Snippet2":::
## Examples
The following example creates a 17-tuple object that contains population data for the city of Detroit, Michigan, from 1860 to 2000. The seventh component of the 17-tuple is the population in 1900. The example uses the <xref:System.Tuple%608.Rest%2A> property to retrieve the values of the eighth through fourteenth components, and it uses the <xref:System.Tuple%608.Rest%2A> property of the nested <xref:System.Tuple%608> object to retrieve the values of the remaining components.
:::code language="csharp" source="~/snippets/csharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.cs" id="Snippet1":::
:::code language="fsharp" source="~/snippets/fsharp/System/TupleT1,T2,T3,T4,T5,T6,T7,TRest/Item1/item1.fs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.tuple`8.item1/vb/item1.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
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<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`8.System#Collections#IStructuralComparable#CompareTo(System.Object,System.Collections.IComparer)" />
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<ReturnValue>
<ReturnType>System.Int32</ReturnType>
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<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`8" /> 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 implementation. It can be used only when the <xref:System.Tuple%608> instance is cast to an <xref:System.Collections.IStructuralComparable> interface.
This method lets you define customized comparisons of <xref:System.Tuple%608> objects. For example, you can use this method to order <xref:System.Tuple%608> objects based on the value of a specific component.
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%608.System%23Collections%23IStructuralComparable%23CompareTo%2A> 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%608.System%23Collections%23IStructuralEquatable%23Equals%2A> method.