VSCode C# Extension on Linux Mint Problem
When you see following error message in vs code
System.TypeLoadException: Could not load type of field 'McMaster.Extensions.CommandLineUtils.CommandLineApplication:_validationErrorHandler' (36) due to: Could not load file or assembly 'System.ComponentModel.DataAnnotations, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies.
at OmniSharp.Stdio.StdioCommandLineApplication..ctor () [0x00000] in <e2653a02ab1f423abb805f2353ec9507>:0
at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_0.<Main>b__0 () [0x00006] in <9671bf457f144c419fb0cdee3ca10088>:0
at OmniSharp.HostHelpers.Start (System.Func`1[TResult] action) [0x0001c] in <48aa3fb56cea4bd5ab9bfdf1170dd033>:0
[ERROR] Error: OmniSharp server load timed out. Use the 'omnisharp.projectLoadTimeout' setting to override the default delay (one minute).
Resolve Steps
* Download version C# Extension 1.15.2 (https://github.com/OmniSharp/omnisharp-vscode/files/2370110/csharp-1.15.2.zip)
* Uninstall the C# extension in VSCode
* Ctrl + Shift + P Extensions: Install from VSIX ... and select C# Extension 1.15.2 vsix
* Reload VSCode