using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        List<Employee> employees = new List<Employee>

            {

                new Employee { EmpID =1, EmpName = "A", ManagerName = "XYZ", Salary = 20000, Comm = 180 },

                new Employee { EmpID =2, EmpName = "B", ManagerName = "XYZ", Salary = 30000 , Comm = 210},

                new Employee { EmpID =3, EmpName = "C", ManagerName = "ABC", Salary = 45000 , Comm= 540},

                new Employee { EmpID =4, EmpName = "D", ManagerName = "XYZ", Salary = 10000 , Comm = 150},

                new Employee { EmpID =5, EmpName = "E", ManagerName = "ABC", Salary = 25000 , Comm = 200},

                new Employee { EmpID =6, EmpName = "F", ManagerName = "XYZ", Salary = 20000 , Comm = 440},

                new Employee { EmpID =7, EmpName = "G", ManagerName = "ABC", Salary = 50000 , Comm = 150},

            };

​

            var query = employees.GroupBy(x => x.ManagerName)

                                 .Select(x => new { ManagerName = x.Key,EmployeeName = x.OrderByDescending(z => z.Salary + (z.Comm ?? 0)).First().EmpName });

​

            foreach (var emp in query)

            {

                Console.WriteLine("ManagerName : {0}, EmployeeName : {1}", emp.ManagerName, emp.EmployeeName);

            }

    }

}

​

public class Employee

    {

        public int EmpID { get; set; }

        public string EmpName { get; set; }

        public string ManagerName { get; set; }

        public decimal Salary { get; set; }

        public int? Comm { get; set; }

    }