.net core breaking changes

- .net core 8 breaking changes
- .net core 7 breaking changes
- .net core 6 breaking changes
- .net 8 ef core breaking changes
- Asp.net core 8 breaking changes
- .net core 3.1 to 6 breaking changes
- .net core 5 breaking changes
- .net core 3 breaking changes
- Asp.net core 7 breaking changes
- .net framework to .net core breaking changes
- .net core 2.1 to 3.1 breaking changes
- Net core 3.1 to net 5 breaking changes