AndroidXTargets.cshtml

<?xml version="1.0" encoding="utf-8"?>
@using System.Linq
@using System.IO
@using System.Xml.Linq
@functions 
{
  public static string GetTargetFrameworkVersion() { return "monoandroid90"; }

  public static void RemoveXmlns(XElement e)
  {
    e.Name = e.Name.LocalName;
     foreach (var node in e.DescendantNodes())
    {
      var n = node as XElement;
      if (n != null)
        RemoveXmlns(n);
    }
  }
}
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  @if (@Model.MavenArtifacts.Count > 0) {

  <ItemGroup>
    @foreach (var art in @Model.MavenArtifacts) {
      if (art.ProguardFile != null) {
    <ProguardConfiguration Include="$(MSBuildThisFileDirectory)..\..\proguard\@(GetTargetFrameworkVersion())\proguard.txt">
      <AndroidXSkipAndroidXMigration>true</AndroidXSkipAndroidXMigration>
    </ProguardConfiguration>
      }
    }
  </ItemGroup>
  }

  <ItemGroup>
    @foreach (var art in @Model.MavenArtifacts) {
      if ($"{art.MavenGroupId}.{art.MavenArtifactId}" == "androidx.multidex.multidex") {
        // multidex is a special case that only includes the aar conditionally
        continue;
      }

      if (art.MavenArtifactPackaging == "aar") {
    <AndroidAarLibrary Include="$(MSBuildThisFileDirectory)..\..\aar\@(art.MavenGroupId).@(art.MavenArtifactId).aar">
      <AndroidXSkipAndroidXMigration>true</AndroidXSkipAndroidXMigration>
    </AndroidAarLibrary>
      } else {
    <AndroidJavaLibrary Include="$(MSBuildThisFileDirectory)..\..\jar\@(art.MavenGroupId).@(art.MavenArtifactId).jar">
      <AndroidXSkipAndroidXMigration>true</AndroidXSkipAndroidXMigration>
    </AndroidJavaLibrary>
      }
    }   
  </ItemGroup>

@{
  string mergeTargets = Path.Combine(Model.Config.BasePath, "source", Model.MavenGroupId, Model.Name, "merge.targets");
  if (File.Exists(mergeTargets)) {
    XDocument xmlTargets = XDocument.Load(mergeTargets);
    XNamespace nsChild = xmlTargets.Root.Name.Namespace;
    @Raw("\r\n\r\n");
    foreach (var xelem in xmlTargets.Element (nsChild + "Project").Elements ()) {
      RemoveXmlns(xelem);
      @Raw("\r\n" + xelem.ToString());
    }
    @Raw("\r\n\r\n");
  }
}
</Project>