private void initSettings()
 {
     _settings = new VSDropSettings();
     foreach (var i in Enumerable.Range(1,5))
     {
         _settings.Settings.Add(new DropActionConfiguration() {Name= $"item {i}"});
     }
 }
        private void initData()
        {
            var s = new VSDropSettings();

            for(var i=0; i<10; i++)
            s.Settings.Add(new DropActionConfiguration() { Name=$"Item{i}" });

            this.vsDropAssistPopupControl1.Data = s;
        }