using System;

public class Program

{

    public static void Main()

    {

            var users = new[]

            {

                new UserTable() {UserId = 1, Name = "James", Department = "Sales", Salary = 100},

                new UserTable() {UserId = 2, Name = "Frank", Department = "Sales", Salary = 110},

                new UserTable() {UserId = 3, Name = "Will", Department = "Ops", Salary = 90},

                new UserTable() {UserId = 4, Name = "Dave", Department = "Ops", Salary = 80},

            };

        // Get users with highest salary in each group

    }

    public class UserTable

    {

        public int UserId { get; set; }

        public string Name { get; set; }

        public string Department { get; set; }

        public double Salary { get; set; }

    }

}