Open .net framework 4.5 project in VS 2022

1. Download Microsoft.NETFramework.ReferenceAssemblies.net45 from nuget.org.
2. Open the package as zip.
3. Copy the files from build\.NETFramework\v4.5\ to C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.