RhSolutions-AddIn/src/RhSolutions.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFrameworks>net472;net6.0-windows</TargetFrameworks>
    <OutputType>Library</OutputType>
    <RootNamespace>RhSolutions.AddIn</RootNamespace>
    <AssemblyName>RhSolutions.AddIn</AssemblyName>
    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
    <UseWindowsForms>true</UseWindowsForms>
    <ImportWindowsDesktopTargets>true</ImportWindowsDesktopTargets>
  </PropertyGroup>
  <PropertyGroup>
    <StartupObject />
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="ExcelDna.AddIn" Version="1.6.0" />
    <PackageReference Include="ExcelDna.IntelliSense" Version="1.6.0" />
    <PackageReference Include="ExcelDna.Interop" Version="15.0.0" />
    <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
    <PackageReference Include="System.Net.Http" Version="4.3.4" />
  </ItemGroup>
</Project>