ADO.net is a data access mechanism that gives a bridge between the front-end controls and the backend database. Microsoft ADO.Net is efficient and scalable data access that encapsulates all the operations and management of software components to access data services from the database.
Entity Framework is an open-source, royalty-free ORM framework for .Net to create web applications by Microsoft. It facilitates developers to work with data using objects of a specific domain for storing and accessing the data in the database properties.
Dapper is a simple micro ORM responsible for mapping the database and programming language for the .Net world. It is a fast and high-performance data access system that creates the virtual database and provides methods to work with those classes.