Dapper is super awesome to handle complex queries that sport multiple joins and some real long business logic. Entity Framework Core is great for class generation, object tracking, mapping to multiple nested classes, and quite a lot more. So it's usually Performance and Features when talking about these 2 ORMs.

Can we use Dapper and Entity Framework?

Yes, you can use it that way. Since Dapper is just working on extension methods, you can use it for the performance-sensitive areas of your code. And you can continue to use EF for other areas of your code.

What is the advantage of Dapper?

Dapper is very fast compared to other ORMs primarily because of its light weight. Dapper was built with performance and ease of use in mind. It provides support for both static and dynamic object binding using transactions, stored procedures, or bulk inserts of data.