sledgemapper/MyGame/MonoGame.Extended.3.8.0/content/mgfxc.runtimeconfig.dev.json

{
  "runtimeOptions": {
    "additionalProbingPaths": [
      "C:\\Users\\tom\\.dotnet\\store\\|arch|\\|tfm|",
      "C:\\Users\\tom\\.nuget\\packages",
      "C:\\Program Files\\dotnet\\sdk\\NuGetFallbackFolder"
    ]
  }
}