title: Cannot add package reference
body: <p>I'm building a xamarin.ios app in VS mac. I'm trying to add a certain package, but when I try to add it I get this error</p>
  <pre><code>jon@jons-MacBook-Pro-2 helloworld % dotnet add package Ditto                
  /Users/jon/Desktop/hello-world/helloworld/helloworld/helloworld.csproj(140,5): error MSB4019: The imported project &quot;/usr/local/share/dotnet/sdk/6.0.300/Xamarin/iOS/Xamarin.iOS.CSharp.targets&quot; was not found. Confirm that the expression in the Import declaration &quot;/usr/local/share/dotnet/sdk/6.0.300//Xamarin/iOS/Xamarin.iOS.CSharp.targets&quot; is correct, and that the file exists on disk.
  Unable to create dependency graph file for project '/Users/jon/Desktop/hello-world/helloworld/helloworld/helloworld.csproj'. Cannot add package reference.
  </code></pre>
  <p>I have also tried using the Nuget manager and I get this when I try to build the project</p>
  <pre><code>/Users/jon/Desktop/hello-world/helloworld/helloworld/MTOUCH: Error MT0009: Error while loading assemblies: /Users/jon/.nuget/packages/ditto/1.1.8/runtimes/win/native/dittoffi.dll. (MT0009) (helloworld)
  </code></pre>
  <p>Any thought??</p>