[X# 3] VSIntegration : Add Multiple Existing Item in project folder never ends

[FabForay]

• Open a Solution/Project
• Right Click -> Add -> Existing item
• Multiple Items, in "root" of Project is ok
• If Items are stored in a folder and the folder has been added to the project structure
• Right Click -> Add -> Existing item
• Multiple Items, in the folder.... Operation never ends