SpinLock.xml

<Type Name="SpinLock" FullName="System.Threading.SpinLock">
  <TypeSignature Language="C#" Value="public struct SpinLock" />
  <TypeSignature Language="ILAsm" Value=".class public sequential ansi sealed beforefieldinit SpinLock extends System.ValueType" />
  <TypeSignature Language="DocId" Value="T:System.Threading.SpinLock" />
  <TypeSignature Language="VB.NET" Value="Public Structure SpinLock" />
  <TypeSignature Language="F#" Value="type SpinLock = struct" />
  <TypeSignature Language="C++ CLI" Value="public value class SpinLock" />
  <AssemblyInfo>
    <AssemblyName>System.Threading</AssemblyName>
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  <Base>
    <BaseTypeName>System.ValueType</BaseTypeName>
  </Base>
  <Interfaces />
  <Attributes>
    <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.Diagnostics.DebuggerDisplay("IsHeld = {IsHeld}")]</AttributeName>
      <AttributeName Language="F#">[&lt;System.Diagnostics.DebuggerDisplay("IsHeld = {IsHeld}")&gt;]</AttributeName>
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      <AttributeName Language="C#">[System.Diagnostics.DebuggerTypeProxy(typeof(System.Threading.SpinLock+SystemThreading_SpinLockDebugView))]</AttributeName>
      <AttributeName Language="F#">[&lt;System.Diagnostics.DebuggerTypeProxy(typeof(System.Threading.SpinLock+SystemThreading_SpinLockDebugView))&gt;]</AttributeName>
    </Attribute>
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    </Attribute>
  </Attributes>
  <Docs>
    <summary>Provides a mutual exclusion lock primitive where a thread trying to acquire the lock waits in a loop repeatedly checking until the lock becomes available.</summary>
    <remarks>
      <format type="text/markdown"><![CDATA[  
  
## Remarks  
 For an example of how to use a Spin Lock, see [How to: Use SpinLock for Low-Level Synchronization](/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization).  
  
 Spin locks can be used for leaf-level locks where the object allocation implied by using a <xref:System.Threading.Monitor>, in size or due to garbage collection pressure, is overly expensive. A spin lock can be useful to avoid blocking; however, if you expect a significant amount of blocking, you should probably not use spin locks due to excessive spinning. Spinning can be beneficial when locks are fine-grained and large in number (for example, a lock per node in a linked list) and also when lock hold-times are always extremely short. In general, while holding a spin lock, one should avoid any of these actions:  
  
-   blocking,  
  
-   calling anything that itself may block,  
  
-   holding more than one spin lock at once,  
  
-   making dynamically dispatched calls (interface and virtuals),  
  
-   making statically dispatched calls into any code one doesn't own, or  
  
-   allocating memory.  
  
 <xref:System.Threading.SpinLock> should only be used after you have been determined that doing so will improve an application's performance. It is also important to note that <xref:System.Threading.SpinLock> is a value type, for performance reasons. For this reason, you must be very careful not to accidentally copy a <xref:System.Threading.SpinLock> instance, as the two instances (the original and the copy) would then be completely independent of one another, which would likely lead to erroneous behavior of the application. If a <xref:System.Threading.SpinLock> instance must be passed around, it should be passed by reference rather than by value.  
  
 Do not store <xref:System.Threading.SpinLock> instances in readonly fields.  
  
   
  
## Examples  
 The following example shows how to use a <xref:System.Threading.SpinLock>:  
  
 :::code language="csharp" source="~/snippets/csharp/System.Threading/SpinLock/Overview/spinlock.cs" id="Snippet01":::
 :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR_System/system.threading.spinlock/vb/spinlock.vb" id="Snippet01":::  
  
 ]]></format>
    </remarks>
    <threadsafe>All members of <see cref="T:System.Threading.SpinLock" /> are thread-safe and may be used from multiple threads concurrently.</threadsafe>
    <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
    <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for low-level synchronization</related>
    <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
  </Docs>
  <Members>
    <Member MemberName=".ctor">
      <MemberSignature Language="C#" Value="public SpinLock (bool enableThreadOwnerTracking);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor(bool enableThreadOwnerTracking) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Threading.SpinLock.#ctor(System.Boolean)" />
      <MemberSignature Language="VB.NET" Value="Public Sub New (enableThreadOwnerTracking As Boolean)" />
      <MemberSignature Language="F#" Value="new System.Threading.SpinLock : bool -&gt; System.Threading.SpinLock" Usage="new System.Threading.SpinLock enableThreadOwnerTracking" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; SpinLock(bool enableThreadOwnerTracking);" />
      <MemberType>Constructor</MemberType>
      <AssemblyInfo>
        <AssemblyName>System.Threading</AssemblyName>
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        <AssemblyName>netstandard</AssemblyName>
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      <Parameters>
        <Parameter Name="enableThreadOwnerTracking" Type="System.Boolean" />
      </Parameters>
      <Docs>
        <param name="enableThreadOwnerTracking">Whether to capture and use thread IDs for debugging purposes.</param>
        <summary>Initializes a new instance of the <see cref="T:System.Threading.SpinLock" /> structure with the option to track thread IDs to improve debugging.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[  
  
## Remarks  
 The parameterless constructor for <xref:System.Threading.SpinLock> tracks thread ownership.  
  
   
  
## Examples  
 The following example demonstrates how a SpinLock may be used.  
  
```csharp  
// C#  
public class MyType  
{  
    private SpinLock _spinLock = new SpinLock();  
  
    public void DoWork()  
    {  
        bool lockTaken = false;   
        try  
        {  
           _spinLock.Enter(ref lockTaken);  
           // do work here protected by the lock  
        }  
        finally  
        {  
            if (lockTaken) _spinLock.Exit();  
        }  
    }  
}  
```  
  
```vb  
' Visual Basic  
  
Class MyType  
   Private _spinLock As New SpinLock()  
  
   Public Sub DoWork()  
      Dim lockTaken As Boolean = False  
      Try  
         _spinLock.Enter(lockTaken)  
         ' do work here protected by the lock  
      Finally  
         If lockTaken Then _spinLock.Exit()  
      End Try  
   End Sub  
End Class  
```  
  
 ]]></format>
        </remarks>
        <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for Low-Level Synchronization</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
      </Docs>
    </Member>
    <Member MemberName="Enter">
      <MemberSignature Language="C#" Value="public void Enter (ref bool lockTaken);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance void Enter(bool&amp; lockTaken) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Threading.SpinLock.Enter(System.Boolean@)" />
      <MemberSignature Language="VB.NET" Value="Public Sub Enter (ByRef lockTaken As Boolean)" />
      <MemberSignature Language="F#" Value="member this.Enter : bool -&gt; unit" Usage="spinLock.Enter lockTaken" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; void Enter(bool % lockTaken);" />
      <MemberType>Method</MemberType>
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      <ReturnValue>
        <ReturnType>System.Void</ReturnType>
      </ReturnValue>
      <Parameters>
        <Parameter Name="lockTaken" Type="System.Boolean" RefType="ref" />
      </Parameters>
      <Docs>
        <param name="lockTaken">True if the lock is acquired; otherwise, false. <paramref name="lockTaken" /> must be initialized to false prior to calling this method.</param>
        <summary>Acquires the lock in a reliable manner, such that even if an exception occurs within the method call, <paramref name="lockTaken" /> can be examined reliably to determine whether the lock was acquired.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[  
  
## Remarks  
 <xref:System.Threading.SpinLock> is a non-reentrant lock, meaning that if a thread holds the lock, it is not allowed to enter the lock again. If thread ownership tracking is enabled (whether it's enabled is available through <xref:System.Threading.SpinLock.IsThreadOwnerTrackingEnabled%2A>), an exception will be thrown when a thread tries to re-enter a lock it already holds. However, if thread ownership tracking is disabled, attempting to enter a lock already held will result in deadlock.  
  
 If you call <xref:System.Threading.SpinLock.Exit%2A> without having first called <xref:System.Threading.SpinLock.Enter%2A> the internal state of the <xref:System.Threading.SpinLock> can become corrupted.  
  
 ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentException">The <paramref name="lockTaken" /> argument must be initialized to false prior to calling Enter.</exception>
        <exception cref="T:System.Threading.LockRecursionException">Thread ownership tracking is enabled, and the current thread has already acquired this lock.</exception>
        <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for Low-Level Synchronization</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
      </Docs>
    </Member>
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      </AssemblyInfo>
      <Docs>
        <summary>Releases the lock.</summary>
      </Docs>
    </MemberGroup>
    <Member MemberName="Exit">
      <MemberSignature Language="C#" Value="public void Exit ();" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance void Exit() cil managed" />
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      <MemberSignature Language="F#" Value="member this.Exit : unit -&gt; unit" Usage="spinLock.Exit " />
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      <ReturnValue>
        <ReturnType>System.Void</ReturnType>
      </ReturnValue>
      <Parameters />
      <Docs>
        <summary>Releases the lock.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[  
  
## Remarks  
 The default overload of <xref:System.Threading.SpinLock.Exit%2A> provides the same behavior as if calling <xref:System.Threading.SpinLock.Exit%2A> using true as the argument.  
  
 If you call <xref:System.Threading.SpinLock.Exit%2A> without having first called <xref:System.Threading.SpinLock.Enter%2A> the internal state of the <xref:System.Threading.SpinLock> can become corrupted.  
  
 ]]></format>
        </remarks>
        <exception cref="T:System.Threading.SynchronizationLockException">Thread ownership tracking is enabled, and the current thread is not the owner of this lock.</exception>
        <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for Low-Level Synchronization</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
      </Docs>
    </Member>
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      <MemberSignature Language="C#" Value="public void Exit (bool useMemoryBarrier);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance void Exit(bool useMemoryBarrier) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Threading.SpinLock.Exit(System.Boolean)" />
      <MemberSignature Language="VB.NET" Value="Public Sub Exit (useMemoryBarrier As Boolean)" />
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      <ReturnValue>
        <ReturnType>System.Void</ReturnType>
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        <Parameter Name="useMemoryBarrier" Type="System.Boolean" />
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      <Docs>
        <param name="useMemoryBarrier">A Boolean value that indicates whether a memory fence should be issued in order to immediately publish the exit operation to other threads.</param>
        <summary>Releases the lock.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[  
  
## Remarks  
 Calling <xref:System.Threading.SpinLock.Exit%2A> with the `useMemoryBarrier` argument set to true will improve the fairness of the lock at the expense of some performance. The default <xref:System.Threading.SpinLock.Exit%2A> overload behaves as if specifying true for `useMemoryBarrier`.  
  
 If you call <xref:System.Threading.SpinLock.Exit%2A> without having first called <xref:System.Threading.SpinLock.Enter%2A> the internal state of the <xref:System.Threading.SpinLock> can become corrupted.  
  
 ]]></format>
        </remarks>
        <exception cref="T:System.Threading.SynchronizationLockException">Thread ownership tracking is enabled, and the current thread is not the owner of this lock.</exception>
        <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for Low-Level Synchronization</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
      </Docs>
    </Member>
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      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
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        <summary>Gets whether the lock is currently held by any thread.</summary>
        <value>true if the lock is currently held by any thread; otherwise false.</value>
        <remarks>To be added.</remarks>
        <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for Low-Level Synchronization</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
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      <MemberSignature Language="C#" Value="public bool IsHeldByCurrentThread { get; }" />
      <MemberSignature Language="ILAsm" Value=".property instance bool IsHeldByCurrentThread" />
      <MemberSignature Language="DocId" Value="P:System.Threading.SpinLock.IsHeldByCurrentThread" />
      <MemberSignature Language="VB.NET" Value="Public ReadOnly Property IsHeldByCurrentThread As Boolean" />
      <MemberSignature Language="F#" Value="member this.IsHeldByCurrentThread : bool" Usage="System.Threading.SpinLock.IsHeldByCurrentThread" />
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        <AssemblyVersion>4.0.10.0</AssemblyVersion>
        <AssemblyVersion>4.1.0.0</AssemblyVersion>
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        <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>
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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>
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      <Attributes>
        <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#">[get: System.Runtime.ConstrainedExecution.ReliabilityContract(System.Runtime.ConstrainedExecution.Consistency.WillNotCorruptState, System.Runtime.ConstrainedExecution.Cer.Success)]</AttributeName>
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      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
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        <summary>Gets whether the lock is held by the current thread.</summary>
        <value>true if the lock is held by the current thread; otherwise false.</value>
        <remarks>
          <format type="text/markdown"><![CDATA[  
  
## Remarks  
 If the lock was initialized to track owner threads, this will return whether the lock is acquired by the current thread. It is invalid to use this property when the lock was initialized to not track thread ownership.  
  
 ]]></format>
        </remarks>
        <exception cref="T:System.InvalidOperationException">Thread ownership tracking is disabled.</exception>
        <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for Low-Level Synchronization</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
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      <MemberSignature Language="DocId" Value="P:System.Threading.SpinLock.IsThreadOwnerTrackingEnabled" />
      <MemberSignature Language="VB.NET" Value="Public ReadOnly Property IsThreadOwnerTrackingEnabled As Boolean" />
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        <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>
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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>
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      <Attributes>
        <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#">[get: System.Runtime.ConstrainedExecution.ReliabilityContract(System.Runtime.ConstrainedExecution.Consistency.WillNotCorruptState, System.Runtime.ConstrainedExecution.Cer.Success)]</AttributeName>
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      <ReturnValue>
        <ReturnType>System.Boolean</ReturnType>
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      <Docs>
        <summary>Gets whether thread ownership tracking is enabled for this instance.</summary>
        <value>true if thread ownership tracking is enabled for this instance; otherwise false.</value>
        <remarks>To be added.</remarks>
        <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for Low-Level Synchronization</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
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      <AssemblyInfo>
        <AssemblyName>System.Threading</AssemblyName>
        <AssemblyVersion>4.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.10.0</AssemblyVersion>
        <AssemblyVersion>4.1.0.0</AssemblyVersion>
      </AssemblyInfo>
      <Docs>
        <summary>Attempts to acquire the lock in a reliable manner, such that even if an exception occurs within the method call, <paramref name="lockTaken" /> can be examined reliably to determine whether the lock was acquired.</summary>
        <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for Low-Level Synchronization</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
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    <Member MemberName="TryEnter">
      <MemberSignature Language="C#" Value="public void TryEnter (ref bool lockTaken);" />
      <MemberSignature Language="ILAsm" Value=".method public hidebysig instance void TryEnter(bool&amp; lockTaken) cil managed" />
      <MemberSignature Language="DocId" Value="M:System.Threading.SpinLock.TryEnter(System.Boolean@)" />
      <MemberSignature Language="VB.NET" Value="Public Sub TryEnter (ByRef lockTaken As Boolean)" />
      <MemberSignature Language="F#" Value="member this.TryEnter : bool -&gt; unit" Usage="spinLock.TryEnter lockTaken" />
      <MemberSignature Language="C++ CLI" Value="public:&#xA; void TryEnter(bool % lockTaken);" />
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        <AssemblyName>System.Threading</AssemblyName>
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        <AssemblyVersion>4.0.10.0</AssemblyVersion>
        <AssemblyVersion>4.1.0.0</AssemblyVersion>
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        <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>
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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>
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      <ReturnValue>
        <ReturnType>System.Void</ReturnType>
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      <Parameters>
        <Parameter Name="lockTaken" Type="System.Boolean" RefType="ref" />
      </Parameters>
      <Docs>
        <param name="lockTaken">True if the lock is acquired; otherwise, false. <paramref name="lockTaken" /> must be initialized to false prior to calling this method.</param>
        <summary>Attempts to acquire the lock in a reliable manner, such that even if an exception occurs within the method call, <paramref name="lockTaken" /> can be examined reliably to determine whether the lock was acquired.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[  
  
## Remarks  
 Unlike <xref:System.Threading.SpinLock.Enter%2A>, TryEnter will not block waiting for the lock to be available. If the lock is not available when TryEnter is called, it will return immediately without any further spinning.  
  
 ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentException">The <paramref name="lockTaken" /> argument must be initialized to false prior to calling TryEnter.</exception>
        <exception cref="T:System.Threading.LockRecursionException">Thread ownership tracking is enabled, and the current thread has already acquired this lock.</exception>
        <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for Low-Level Synchronization</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
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    <Member MemberName="TryEnter">
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      <MemberSignature Language="C++ CLI" Value="public:&#xA; void TryEnter(int millisecondsTimeout, bool % lockTaken);" />
      <MemberType>Method</MemberType>
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        <AssemblyName>System.Threading</AssemblyName>
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        <AssemblyVersion>4.1.0.0</AssemblyVersion>
        <AssemblyVersion>4.1.1.0</AssemblyVersion>
        <AssemblyVersion>4.1.2.0</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>
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        <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>
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        <Parameter Name="millisecondsTimeout" Type="System.Int32" />
        <Parameter Name="lockTaken" Type="System.Boolean" RefType="ref" />
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        <param name="millisecondsTimeout">The number of milliseconds to wait, or <see cref="F:System.Threading.Timeout.Infinite" /> (-1) to wait indefinitely.</param>
        <param name="lockTaken">True if the lock is acquired; otherwise, false. <paramref name="lockTaken" /> must be initialized to false prior to calling this method.</param>
        <summary>Attempts to acquire the lock in a reliable manner, such that even if an exception occurs within the method call, <paramref name="lockTaken" /> can be examined reliably to determine whether the lock was acquired.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[  
  
## Remarks  
 Unlike <xref:System.Threading.SpinLock.Enter%2A>, TryEnter will not block indefinitely waiting for the lock to be available. It will block until either the lock is available or until the `millisecondsTimeout` has expired.  
  
 ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
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        <exception cref="T:System.Threading.LockRecursionException">Thread ownership tracking is enabled, and the current thread has already acquired this lock.</exception>
        <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for Low-Level Synchronization</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
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        <AssemblyVersion>4.0.0.0</AssemblyVersion>
        <AssemblyVersion>4.0.10.0</AssemblyVersion>
        <AssemblyVersion>4.1.0.0</AssemblyVersion>
        <AssemblyVersion>4.1.1.0</AssemblyVersion>
        <AssemblyVersion>4.1.2.0</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.Void</ReturnType>
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        <Parameter Name="timeout" Type="System.TimeSpan" />
        <Parameter Name="lockTaken" Type="System.Boolean" RefType="ref" />
      </Parameters>
      <Docs>
        <param name="timeout">A <see cref="T:System.TimeSpan" /> that represents the number of milliseconds to wait, or a <see cref="T:System.TimeSpan" /> that represents -1 milliseconds to wait indefinitely.</param>
        <param name="lockTaken">True if the lock is acquired; otherwise, false. <paramref name="lockTaken" /> must be initialized to false prior to calling this method.</param>
        <summary>Attempts to acquire the lock in a reliable manner, such that even if an exception occurs within the method call, <paramref name="lockTaken" /> can be examined reliably to determine whether the lock was acquired.</summary>
        <remarks>
          <format type="text/markdown"><![CDATA[  
  
## Remarks  
 Unlike <xref:System.Threading.SpinLock.Enter%2A>, TryEnter will not block indefinitely waiting for the lock to be available. It will block until either the lock is available or until the `timeout` has expired.  
  
 ]]></format>
        </remarks>
        <exception cref="T:System.ArgumentOutOfRangeException">
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        <exception cref="T:System.ArgumentException">The <paramref name="lockTaken" /> argument must be initialized to false prior to calling TryEnter.</exception>
        <exception cref="T:System.Threading.LockRecursionException">Thread ownership tracking is enabled, and the current thread has already acquired this lock.</exception>
        <related type="Article" href="/dotnet/standard/threading/spinlock">SpinLock</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-use-spinlock-for-low-level-synchronization">How to: Use SpinLock for Low-Level Synchronization</related>
        <related type="Article" href="/dotnet/standard/threading/how-to-enable-thread-tracking-mode-in-spinlock">How to: Enable Thread-Tracking Mode in SpinLock</related>
      </Docs>
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</Type>