Unable to build in VS due to numerous erros with packages

So i've recently devloped an issue where i cannot build from inside visual studio. I can run the game from unity without an issue, but i cannot attach to debug due to these build errors. There are 144 errors so I wont post them all, Below is a few (slightly edited for brevity)

Source file 'E:\Game Dev\...\Packages\com.unity.textmeshpro\Scripts\Runtime\FastAction.cs' could not be found. Unity.TextMeshPro
Source file 'E:\Game Dev\...\Packages\com.unity.textmeshpro\Scripts\Runtime\TMP_ColorGradient.cs' could not be found. Unity.TextMeshPro
Source file 'E:\Game Dev\...\Packages\com.unity.package-manager-ui\Editor\Sources\Services\Interfaces\IRemoveOperation.cs' could not be found. Unity.PackageManagerUI.Editor
Metadata file 'E:\Game Dev\...\Temp\UnityVS_bin\Debug\Unity.PackageManagerUI.Editor.dll.dll' could not be found Restaurateur.Plugins
Metadata file 'E:\Game Dev\...\Temp\UnityVS_bin\Debug\Assembly-CSharp-firstpass.dll.dll' could not be found Restaurateur

Additional information:
The UnityVS_bin/Debug folder is indeed blank.

I have tried the usual solutions, deleted the csproj and sln files, the library folder.
Re-installed unity from scratch.
Tried a new project (exact same errors)

I've also noticed that now the solution Unity generates has a number of projects such as UnityEditor.StandardEvents and Unity.TextMeshPro about about 4 others. Not sure if this is normal now

I'm at a complete loss, any suggestions would be appreciated.

 

Ok, so with the help of the guys on discord i was able to work out the issue. I had forgotten to update my visual studio. One update later and everything works fine.

 

Any other details pertaining to this, i'm already running VS2015 at it's latest versions and get a similar issue. VS2017 isn't an option for me currently.