/// <summary>
/// Extends BeginInvoke so that when a state object is not needed, null does not need to be passed.
/// <example>
/// mousebuttoneventhandler.BeginInvoke(sender, e, callback);
/// </example>
/// </summary>
public static IAsyncResult BeginInvoke(this MouseButtonEventHandler mousebuttoneventhandler, Object sender, MouseButtonEventArgs e, AsyncCallback callback)
{
if (mousebuttoneventhandler == null)
{
throw new ArgumentNullException("mousebuttoneventhandler");
}
return(mousebuttoneventhandler.BeginInvoke(sender, e, callback, null));
}
