public static IAsyncResult Begin(AsyncCallback callback, object state, BeginInvokeDelegate beginDelegate,
EndInvokeDelegate <TResult> endDelegate, object tag, int timeout)
{
WrappedAsyncResult <TResult> asyncResult = new WrappedAsyncResult <TResult>(beginDelegate, endDelegate, tag);
asyncResult.Begin(callback, state, timeout);
return(asyncResult);
}
public static WrappedAsyncResult <TResult> Cast(IAsyncResult asyncResult, object tag)
{
Assertions.NotNull(asyncResult, "asyncResult");
WrappedAsyncResult <TResult> castResult = asyncResult as WrappedAsyncResult <TResult>;
if (castResult != null && Object.Equals(castResult._tag, tag))
{
return(castResult);
}
else
{
throw new ArgumentException("The provided IAsyncResult is not valid for this method.");
}
}