Dapper is a simple object mapper for .NET and owns the title of King of Micro ORM in terms of speed and is virtually as fast as using a raw ADO.NET data reader. An ORM is an Object Relational Mapper, which is responsible for mapping between database and programming language.
You can install Dapper into your application using Nuget Package Manager or by issuing the following command in NPM console.
PM> Install-Package Dapper
You can learn Dapper from their official tutorial here.
There are plenty of examples which you can try just inside your browser. Check them out here.