gistfile1.cs

public abstract class CommandBase : ICommand
{

	public abstract void Execute();

	public virtual bool CanExecute()
	{
		return true;
	}

	void ICommand.Execute( object parameter )
	{
		Execute();
	}

	bool ICommand.CanExecute( object parameter )
	{
		return CanExecute();
	}
	
	public event EventHandler CanExecuteChanged
	{
		add { CommandManager.RequerySuggested += value; }
		remove { CommandManager.RequerySuggested -= value; }
	}

}