Single-File: dotnet don't check if the temp files are corrupted

[yehia2amer]

Problem
I got a weird issue from one of my customers, that each time he is trying to run the application. he got this error:

Error:
  An assembly specified in the application dependencies manifest (appname.deps.json) was not found:
    package: 'Microsoft.DotNet.PlatformAbstractions', version: '2.0.4'
    path: 'lib/netstandard1.3/Microsoft.DotNet.PlatformAbstractions.dll'

After debugging for a couple of hours it turns out that the files in the temp folder : %TEMP%.net are somehow corrupted or not complete. and the issue was fixed by deleting the folder and running again.

Suggested Solution
dotnet save a hash of this temp folder and if it don't match it regenerate this folder.

Environment
Windows 10 - 1809
dotnet core 3.1

[vitek-karas]

/cc @swaroop-sridhar

[swaroop-sridhar]

Thanks for reporting this @yehia2amer.
A fix for this problem is approved for .net core 3.1 servicing: dotnet/core-setup#9013. It is expected to be in the May release.

[swaroop-sridhar]

Dup of #3778