the pack replied. "Your modern compiler will read my signatures. It will believe you are building for 2010. But your editor, your debugger, your test runner—they will all use your modern runtime. The old server will accept your output because it speaks the same language. But you, Leo, will stay in the future."
machine. It allows you to compile code against a specific version of .NET even if you have a newer version of the framework installed on your system. Reference Assemblies: microsoft .net framework 4 multi targeting pack
"What are you?" Leo asked.