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TaskCompletionSource<TResult>.TrySetException Method (Exception)

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

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

public bool TrySetException(
	Exception exception


Type: System.Exception
The exception to bind to this Task<TResult>.

Return Value

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


The Task was disposed.


The exception argument is null.

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

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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