Should I Call RaiseCanExecuteChanged in Prism' DelegateCommand?

I have written a CanExecute method for the DelegateCommand. CanExecute is not being re-evaluated as other commands which inherites from a CommandBase, that looks like this.

public abstract class CommandBase : ICommand
{
    public event EventHandler CanExecuteChanged
    {
        add { CommandManager.RequerySuggested += value; }
        remove { CommandManager.RequerySuggested -= value; }
    }

    public void RaiseCanExecuteChanged()
    {
        CommandManager.InvalidateRequerySuggested();
    }

    public virtual bool CanExecute(object paramete开发者_JAVA技巧r)
    {
        return true;
    }

    public abstract void Execute(object parameter);
}

Can I make the Prism DelegateCommand work like this, so CanExecute is automatically re-evaluated when appropriate or should I manually call RaiseCanExecuteChanged() when needed?

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How should the command or the command manager know that it's execution state changed? To have them know about that you need to signal this via the RaiseCanExecuteChanged method.