Google OrTools Windows ARM64 nuget package. Use it like this.
Put the files Google.OrTools.9.14.6214.nupkg and Google.OrTools.runtime.win-arm64.9.14.6214.nupkg into the packages folder inside your project and add the next lines to your csproj file:
<PropertyGroup>
<RestoreSources>./packages;$(RestoreSources)</RestoreSources>
</PropertyGroup>