public void SetException(Exception exception)
{
if (exception == null)
{
throw new ArgumentNullException("exception");
}
System.Threading.Tasks.Task <TResult> task = this.m_task ?? this.Task;
OperationCanceledException canceledException = exception as OperationCanceledException;
if ((canceledException != null ? (task.TrySetCanceled(canceledException.CancellationToken, (object)canceledException) ? 1 : 0) : (task.TrySetException((object)exception) ? 1 : 0)) == 0)
{
throw new InvalidOperationException(Environment.GetResourceString("TaskT_TransitionToFinal_AlreadyCompleted"));
}
}