using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

          List<Employee> employees = new List<Employee>

            {

                new Employee { Name = "foo", Type = "A" },

                new Employee { Name = "bar", Type = "B" },

            };

​

​

            var result = employees.Select(x => new Employee { Name = x.Name,Type = x.Type }).GroupBy(x => new { x.Type, x.Name }).ToList();

          foreach(var item in result)

          {

              Console.WriteLine("Category: {1} {0}", item.Key.Type, item.Key.Name);

          }

    }

     public class Employee

    {

        public string Name { get; set; }

        public string Type { get; set; }

    }

​

}