Doesn't work with vs2019 (Version 16.11.2) ?

[andygemis]

Actual behavior

Under vs 2022 - have a sln/csproj and the source generator is working correctly.

Open same sln with 2019 - then get following error

1>CSC : warning CS8785: Generator 'SourceGenerator' failed to generate source. It will not contribute to the output and compilation errors may occur as a result. Exception was of type 'FileNotFoundException' with message 'Could not load file or assembly 'System.Collections.Immutable, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.'

Repro steps

1. NativeMethods.txt content:

SCardEstablishContext
SCardReleaseContext
SCardListReaderGroups
SCardListReaders
SCardGetStatusChange

2. NativeMethods.json content (if present):

{
  "$schema": "https://aka.ms/CsWin32.schema.json",
  "emitSingleFile": true,
  "public": true
}

Context

• CsWin32 version: 0.2.206-beta
• Target Framework: .net framework 4.8