/// <summary>
/// Creates a new strong-event implementation of <c>ICommand.CanExecuteChanged</c>.
/// </summary>
/// <param name="sender">The sender of the <c>ICommand.CanExecuteChanged</c> event.</param>
public StrongCanExecuteChanged(object sender)
{
_threadAffinity = ThreadAffinity.BindToCurrentThread();
_sender = sender;
}