Fix warnings. Fix build.

Author: rstarkov

.github/workflows/build.yml

@@ -43,10 +43,10 @@ jobs:
         run: dotnet test
 
       - name: "dotnet pack: ${{ env.VER_STR }}"
-        run: dotnet pack Src/RT.Keyboard.csproj --configuration Release -p:InformationalVersion="${{env.VER_STR}}" -p:VersionPrefix=${{env.VER_NUM}} -p:VersionSuffix=${{env.VER_SUF}} -p:FileVersion=${{env.VER_NUM}} -p:AssemblyVersion=${{env.VER_NUM}} -o Publish
+        run: dotnet pack Src\RT.Keyboard.csproj --configuration Release -p:InformationalVersion="${{env.VER_STR}}" -p:VersionPrefix=${{env.VER_NUM}} -p:VersionSuffix=${{env.VER_SUF}} -p:FileVersion=${{env.VER_NUM}} -p:AssemblyVersion=${{env.VER_NUM}} -o Publish
 
       - name: Push to NuGet
-        run: dotnet nuget push Publish/*.nupkg -k ${{ secrets.NUGET_API_KEY }} -s https://api.nuget.org/v3/index.json
+        run: dotnet nuget push Publish\*.nupkg -k ${{ secrets.NUGET_API_KEY }} -s https://api.nuget.org/v3/index.json
 
       - name: Upload artifact
         uses: actions/upload-artifact@v3

Src/WinAPI.cs

@@ -34,6 +34,7 @@ static class WinAPI
     public const int INPUT_KEYBOARD = 1;
     public const int INPUT_HARDWARE = 2;
 
+#pragma warning disable 0649 // field is never assigned
     public struct KeyboardHookStruct
     {
         public int vkCode;