I.E. Version 9 of the .NET SDK supports targeting versions of .NET other than just 9. Which ones? At what point does a target get removed from the latest SDK version? I'm not seeing anything in documentation that really specifies this.
More specifically, I have .NET SDK 9 installed and I'm getting errors trying to build a project that includes .NET 5 in its targets. Does SDK 9 not support .NET 5, or is there some other issue going on? How far back do I need to go in SDKs to get .NET 5 targeting?