Follow the Migration Guide provided at https://docs.abp.io to apply changes for existing solutions that you’re upgrading from the version 3.3.
- This Microsoft article shows how to migrate from Newtonsoft.Json to System.Text.Json.
- Check out the IdentityServer4 library from 3.x to 4.1.1 with the ABP Framework version 4.0. IdentityServer 4.x has a lot of changes. Some of them are breaking changes in the data structure.
- You can also check out the upgrading document.
- Halil the lead developer has documented Implementing Domain Driven Design which is a practical guide for developers who want to implement the DDD principles in their solutions.
- The new Testing document discusses different kind of automated tests and explains how you can write tests for your ABP based solutions
- The VoloSoft Team have created a lot of documents for the MVC, Blazor and the Angular UI.