///<summary>
/// Invokes the <see cref="CanExecuteChanged"/> event.
///</summary>
public void OnCanExecuteChanged()
{
WeakEventHandlerManager.CallWeakReferenceHandlers(this, _canExecuteChangedHandlers);
}
/// <summary>
/// Raises <see cref="ICommand.CanExecuteChanged"/> on the UI thread so every
/// command invoker can requery <see cref="ICommand.CanExecute"/> to check if the
/// <see cref="CompositeCommand"/> can execute.
/// </summary>
protected virtual void OnCanExecuteChanged()
{
WeakEventHandlerManager.CallWeakReferenceHandlers(this, _canExecuteChangedHandlers);
}
protected virtual void OnCanExecuteChanged()
{
CommandManager.InvalidateRequerySuggested();
WeakEventHandlerManager.CallWeakReferenceHandlers(this, _canExecuteChangedHandlers);
}