SimpleCommand - simple ICommand implementation

SimpleCommand.cs

public class SimpleCommand : ICommand
{
	private readonly Func<bool> _canExecute;
	private readonly Action _execute;

	public SimpleCommand(Action execute, Func<bool> canExecute = null)
	{
		_execute = execute;
		_canExecute = canExecute;
	}

	public event EventHandler CanExecuteChanged
	{
		add { CommandManager.RequerySuggested += value; }
		remove { CommandManager.RequerySuggested -= value; }
	}

	public void Execute(object parameter)
	{
		_execute();
	}

	public bool CanExecute(object parameter)
	{
		if (_canExecute != null)
		{
			return _canExecute();
		}
		return true;
	}
}