TaskCompletionSource<TResult>.TrySetException Method (IEnumerable<Exception>)

Attempts to transition the underlying Task<TResult> into the Faulted state.

Namespace:  System.Threading.Tasks
Assembly:  mscorlib (in mscorlib.dll)

public bool TrySetException(
	IEnumerable<Exception> exceptions


Type: System.Collections.Generic.IEnumerable<Exception>

The collection of exceptions to bind to this Task<TResult>.

Return Value

Type: System.Boolean
True if the operation was successful; otherwise, false.


The Task was disposed.


The exceptions argument is null.


There are one or more null elements in exceptions.


The exceptions collection is empty.

This operation will return false if the Task<TResult> is already in one of the three final states: RanToCompletion, Faulted, or Canceled.

.NET Framework

Supported in: 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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