Migration from ADO.Net to Entity Framework Core

The BPM tool which was developed in our company, could only work with SQL Server, later on a need occurred to make it work with PostgreSQL and other RDMS. It has been decided to migrate custom created ADO.net structures to Entity Framework Core (EF Core). The aim of this article is to share some advice and tips for the ones who have decided to apply this migration or for the one who are already using the EF