Install .NET sdk 9.0.2

Set TargetFramework to 9.0

<PropertyGroup>
  <TargetFramework>net9.0</TargetFramework>
  <Nullable>enable</Nullable>
  <ImplicitUsings>enable</ImplicitUsings>
</PropertyGroup>

Update all package version to 9.0.2

Make sure you have VS Studio 2022 (17.13.2) or higher