public static GeneralSideTool Get()
 {
     if (instance == null)
     {
         instance = new GeneralSideTool();
     }
     return(instance);
 }
        public GeneralSideTool()
        {
            GeneralSideToolViewModel gstvm = new GeneralSideToolViewModel();

            this.InitializeComponent();
            this.DataContext = gstvm;
            SideToolsViewModel.Get().setGeneralV(this);
            SideToolsViewModel.Get().setGeneralVM(gstvm);
            instance = this;
        }