project-system: .csproj file not updated in Visual Studio until user does a Save All or closes solution

From @dougbu on February 25, 2017 0:38

Please read the following information before posting the issue.

Before posting the issue…

• If you’re having trouble with the NuGet client tools (the Visual Studio extension, NuGet.exe command line tool, etc.), you are in the right place.

Details about Problem

NuGet product used: VS UI Nuget Package Manager 4.0.0

dotnet.exe --version: 1.0.0-rc4-004883

VS version (if appropriate): 15.0.0+26222.1d15rel

OS version: Win10 v1607 (14393.696)

Worked before? Not positive but thing old package.config file was updated immediately.

Detailed repro steps so we can see the same problem

1. Create a .NET Core Console solution
2. Add a package e.g. Microsoft.EntityFrameworkCore.SqlServer v1.0.0
3. Save everything
4. Switch to a console window and confirm the .csproj file contains

   <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.0.0" />
   

5. Open “Manage NuGet Packages…” again
6. Update the package to a newer version e.g. v1.1.0 in above case
7. Wait for restore to complete
8. Switch to console window and… Expected

   <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.1.0" />
   

   Actual

   <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.0.0" />
   

9. Save everything in Visual Studio
10. Now Actual will match Expected.

Other suggested things

Verbose Logs

Please include verbose logs (NuGet.exe <COMMAND> -verbosity detailed | dotnet.exe <COMMAND> --verbose | etc…)

Sample Project

Very helpful if you can zip a project and paste into this issue!

Copied from original issue: NuGet/Home#4689