void a(int b)
{
    #region constructors
    a(){}
#endregion
}

namespace DemoApp.ViewModel
{
    public abstract class WorkspaceViewModel : ViewModelBase
    {
        #region Fields

        RelayCommand _closeCommand;

        #endregion // Fields

        #region Constructor

        protected WorkspaceViewModel()
        {
        }

        #endregion // Constructor

        #region CloseCommand

        public ICommand CloseCommand
        {
            get
            {
                if (_closeCommand == null)
                    _closeCommand = new RelayCommand(param => this.OnRequestClose());

                return _closeCommand;
            }
        }

        #endregion // CloseCommand

        #region RequestClose [event]

        public event EventHandler RequestClose;

        void OnRequestClose()
        {
            EventHandler handler = this.RequestClose;
            if (handler != null)
                handler(this, EventArgs.Empty);
        }

        #endregion // RequestClose [event]
    }
}