Visual Studio 2015 - Nuget Exception - GetFullVsVersionString must be called on the UI thread

Question

User1194777115 posted

While attempting to build or open a project in Visual Studio 2015 Update 3, I keep getting errors around nuget package management.
Whenever I build the project the first time after opening VS, I get the error message below.
I also get it when I try to open the nuget package manager dialog.
Anyone else experience this?

%% Here is the error %%

An exception was thrown while initializing part "Nuget.PackageManagement.VisualStudio.VSolutionManager". GetFullVsVersionString must be called on the UI thread.

---

 Here is another thread in ASP.NET about this issue : 

Operation Failed An exception was thrown while initializing part (on NugetPack click.)

People say install this plugin for fix this issue.
But when i open that url i face this error :

We're sorry, the page you requested cannot be found!

In VisualStudio 2015 -> Tools -> Extensions and updates -> Online: Search for the string: "Fix NuGet GetFullVsVersionString must be called on the UI thread" and install the given fix.

Alternatively you can download the fix at : GetFullVsVersionString fix

Now in February 2018, the latest NuGet Package Manager version 3.4.4.1321 does not have the fix included, so the patch must be applied.

As Steve Greene's answer describes, I also had the Telerik extension installed, so that might have caused the problem.

I searched that phrase in VS - But could n't find anything.
Also GetFullVsVersionString fix does n't exist any more.
I also reinstalled nuget package manager - no help.
What is the solution?

Answer 1

User-939850651 posted

Hi MAJID_DARAB,

According to your description, I am afraid that I can't reproduce your problem. And I did some searching on the problem and I found that the problem might be caused by other third party extensions, components caches, nuget caches or VS environment.

You could try ( refer to this case) :

1) disable any third party installed extensions exclude under Tools-->Extensions and Updates except NuGet Package Manager for Visual Studio 2015.

Then, uninstall NuGet Package Manager for Visual Studio 2015 extension.

2) close VS,

a) delete all nuget caches under C:\Users\xxx(current user)\.nuget\packages and also delete the nuget.config under C:\Users\xxx(current user)\AppData\Roaming\NuGet`

Besides, delete .vs hidden folder under the solution folder, bin and obj folder of the project folder.

b) delete all component caches under

C:\Users\Administrator\AppData\Local\Microsoft\VisualStudio\14.0\ComponentModelCache

c) then restart VS and then install nuget extension directly from this VS marketplace website.

3) try to run devenv /safemode under Developer Command Prompt for VS2015 to start VS and then test again. This mode is a pure, initial vs environment when you first installed.

4) repair VS from the Control Panel-->Programs-->right click on VS2015-->Change-->Repair

Hope this can help you.

Best regards,

Xudong Peng

Answer 2

User1194777115 posted

Hi XuDong Peng,

Can you help me to find this extension?

Why did they remove it from marketplace?

When i create a totally new project in VS and close it's solution & open my prefer project in it error vanished.

Why does VS act like this?

I also have Telerik installed in VS. Is it related to that error?

Answer 3

User1194777115 posted

When i delete .vs hidden folder and open VS error vanished.
but when i close VS & reopen it again i face that error again.
What is wrong about .vs hidden folder?

Answer 4

User-939850651 posted

Hi MAJID_DARAB,

I couldn't find the extension you mentioned, and get the same prompt as you appeared ( cannot be found ).

Have you carefully read the possible causes of the problem ( third party extensions, components caches, nuget caches or VS environment ) I mentioned above and tried the solutions?

Do they solve your current problem?

Best regards,

Xudong Peng

Answer 5

User1194777115 posted

I figured out problem is from telerik extensions.    
I cleared VS log and grabed that error like this :    
ActivityLog.xml
How can i fix it without disabling Telerik Extensions? 

Answer 6

User1194777115 posted

Link Update :

ActivityLog.xml

Answer 7

User-939850651 posted

Hi MAJID_DARAB,

I figured out problem is from telerik extensions.    
I cleared VS log and grabed that error like this :    
ActivityLog.xml
How can i fix it without disabling Telerik Extensions? 

I am afraid that I cannot find out a solution since it is related to the telerik extensions

I recommend you reporting this issue on Telerik forums: https://www.telerik.com/forums

Best regards,

Xudong Peng

Answer 8

User1194777115 posted

Dear XuDong Peng thanks for your attention all the time.

You are the best.