This is a general "epic" tracking issue for making Npgsql more compatible with trimming/AOT. A lot of this is about getting rid of runtime code generation (e.g. via source generators), general reflection use, etc. See also dotnet/efcore#21894 for some general comments on what that means and what needs to be done.

• Generate non-generic write logic with source generators #3513
• Stop using reflection to map built-in types #3507
• Refactor DefaultTypeHandlerFactory for trimming friendliness #3815
• Static init of ConnectionStringBuilder is very reflection heavy  #3814
• Lazy allocation of type handlers (again) #3816
• Console program to verify basic flows in AOT/reflection-free mode #3820