.net 6 breaking changes July 8, 2019 16 32 64 128 .net 6 breaking changes entity framework .net core 6 breaking changes .net 6 to 8 breaking changes .net 6 to 7 breaking changes .net core 3.1 to 6 breaking changes .net 6 vs .net 8 breaking changes .net 6 to .net 7 .net 6 features