Error message "there are no writable config files" when try to open "Manage nuget packages"

Question

Visual Studio 2015 Preview shows error message "there are no writable config files" when try to open "Manage nuget packages" on "References" C# solution can be found: https://github.com/constructor-igor/TechSugar/trunk/Powershell/Sample_Read_Process_Write/CustomerObjects

Accepted Answer

Had same issue, it is not related to the solution/project, simply delete NuGet configuration file and it should work again.

```
C:\Users\USERNAME\AppData\Roaming\NuGet\NuGet.Config
```

Error message "there are no writable config files" when try to open "Manage nuget packages"

Solution

Problem