[.NET Migration Guide Revamp] [Phase 1] Update #24558
Description
For details on revamp see: #23561
New TOC: #23215
- Overview of porting from .NET Framework to .NET (UPDATE) Update the first section to reflect/describe the overall migration guide and maybe reference coming work? For phase 1 keep all additional sub-topics as is until they can be moved out to their appropriate new location based on the new TOC ([.NET Migration Guide Revamp] [Phase 2] Cleanup the main Migration guide overview page. #24559 to track this).