How to Use Group By in LINQ

When you are familiar with SQL Queries it is just the same way to implement in C# as well.

from emp in employees
group emp by emp.Salary into grp
select grp;

The above code indicates that --> based on employee salary group employees into group grp;
Key is the group column value;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace LINQPractice
{
    class GroupBy
    {

        static void Main(string[] args)
        {
            List employees = new  List
            {
                new Employee{EmpId=100,EmpName="sachin",Salary=15000},
                new Employee{EmpId=101,EmpName="scott",Salary=12000},
                new Employee{EmpId=102,EmpName="rahul",Salary=13000},
                new Employee{EmpId=103,EmpName="ilyas",Salary=13000}
            };

            Console.WriteLine("Group operators:");
            var query = from emp in employees
                        group emp by emp.Salary into grp
                        select grp;
            foreach (var group in query)
            {
                Console.WriteLine(group.Key);

                foreach (var emp in group)
                {
                    Console.WriteLine("{0,-5}{1,-8}{2,-6}",emp.EmpId ,emp.EmpName,emp.Salary);
                }
            }
            Console.ReadLine( );
        }
    }
}