Can you name popular libraries or tools for working with object-relational mapping?

Popular libraries and tools for working with Object-Relational Mapping (ORM) in C#:

• Entity Framework (EF) — Microsoft's official ORM, supports LINQ queries, migrations, and working with various DBMS.
• Dapper — lightweight micro-ORM focused on high performance and simplicity.
• NHibernate — powerful and flexible ORM with rich functionality, inspired by Hibernate from Java.

Example of using Entity Framework to get a list of users:

using(var context = new AppDbContext())
{
    var users = context.Users.ToList();
}