stockpicker not able to be added
I am watching the first video, and when I tried to add "security picker" from toolbox,
I just only see following error message and cannot add it.
"The following reference has been added to the project:
"StockSharp.Xaml, Version=18.104.22.168, Culture=neutral, PublickKeyToken=null"
In order to user types from the new reference, press OK to restart the XAML Designer. After the XAML Designer restarts, re-create the control on the artboard.
I have close the MainWindow.xaml and reopened, but not successful.