public IRemoveClassCommandFromTargetSyntax RemoveClass(string className)
        {
            if (String.IsNullOrEmpty(className))
            throw new ArgumentNullException("className");

              var commandBuilder = new RemoveClassCommandBuilder(this, className);
              return commandBuilder;
        }
        public IRemoveClassCommandFromTargetSyntax RemoveClasses(params string[] classNames)
        {
            if (classNames == null || classNames.Length == 0)
            throw new ArgumentNullException("classNames");
              if (classNames.Any(String.IsNullOrEmpty))
            throw new ArgumentNullException("classNames");

              var commandBuilder = new RemoveClassCommandBuilder(this, classNames);
              return commandBuilder;
        }