Not working anymore on C# Shared Projects (since VS 15.8.1)

[JCKodel]

Installed product versions

• Visual Studio: 2017 Enterprise 15.8.1
• This extension: 3.5.129

Description

Not working anymore in C# Shared Projects (used to work just fine until last update)

Steps to recreate

1. Create a C# Shared project
2. Press Shift+F2 to add new file
3. Type any name

Current behavior

The file is created on disk, but not in the project. An exception is thrown:

22-Aug-18 13:35:03: System.NotSupportedException: No item can be placed here.
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.<AddItemWithSpecificAsync>d__613.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProjectItems.<AddItemAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProjectItems.<>c__DisplayClass4_0.<<AddFromFile>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread()
   at Microsoft.VisualStudio.Threading.JoinableTask`1.CompleteOnCurrentThread()
   at Microsoft.VisualStudio.Threading.JoinableTaskFactory.Run[T](Func`1 asyncMethod, JoinableTaskCreationOptions creationOptions)
   at Microsoft.VisualStudio.Threading.JoinableTaskFactory.Run[T](Func`1 asyncMethod)
   at Microsoft.VisualStudio.ProjectSystem.ProjectMultiThreadedService.ExecuteSynchronously[T](Func`1 asyncAction)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProjectItems.AddFromFile(String fileName)
   at MadsKristensen.AddAnyFile.ProjectHelpers.AddFileToProject(Project project, FileInfo file, String itemType) in C:\projects\addanyfile\src\Helpers\ProjectHelpers.cs:line 108
   at MadsKristensen.AddAnyFile.AddAnyFilePackage.<MenuItemCallback>d__2.MoveNext() in C:\projects\addanyfile\src\AddAnyFilePackage.cs:line 94
22-Aug-18 15:16:41: System.NotSupportedException: No item can be placed here.
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.ProjectNode.<AddItemWithSpecificAsync>d__613.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProjectItems.<AddItemAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProjectItems.<>c__DisplayClass4_0.<<AddFromFile>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread()
   at Microsoft.VisualStudio.Threading.JoinableTask`1.CompleteOnCurrentThread()
   at Microsoft.VisualStudio.Threading.JoinableTaskFactory.Run[T](Func`1 asyncMethod, JoinableTaskCreationOptions creationOptions)
   at Microsoft.VisualStudio.Threading.JoinableTaskFactory.Run[T](Func`1 asyncMethod)
   at Microsoft.VisualStudio.ProjectSystem.ProjectMultiThreadedService.ExecuteSynchronously[T](Func`1 asyncAction)
   at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProjectItems.AddFromFile(String fileName)
   at MadsKristensen.AddAnyFile.ProjectHelpers.AddFileToProject(Project project, FileInfo file, String itemType) in C:\projects\addanyfile\src\Helpers\ProjectHelpers.cs:line 108
   at MadsKristensen.AddAnyFile.AddAnyFilePackage.<MenuItemCallback>d__2.MoveNext() in C:\projects\addanyfile\src\AddAnyFilePackage.cs:line 94

Expected behavior

Include the created file on the C# Shared Project.