I currently have an efcore 2.1 project with about 230 entities and about 350 migrations. Every time i add an efcore migration, a designer file is created. This file is approxima
I think your question is a duplicate of Recommended way to clean old Entity Framework Core migrations and Entity Framework Core: Is it safe to delete Migration.Designer.cs if we will never Revert a migration?. The whole topic is discussed in various answers on these threads.
I suggest to consider my answer in order to get your IDE snappy again and to reduce compilation time. And in the long run, it seems good practice to roll-up all migrations into one from time to time. If this is not urgent in your case, you might want to wait for this feature (planned for .NET 6) that allows you to do so in a simpler way.