My solution (or a trial) to Run Length Encoding (Function Problem)

RunLengthEncoding.cs

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

namespace ConsoleApplication11
{

    //https://practice.geeksforgeeks.org/problems/run-length-encoding/1#ExpectOP
    class Program
    {
        static void Main(string[] args)
        {
            string input = "relax Don't do it";

            var freq = from x in input
                       group x by x into y
                       select y;

            foreach (var item in freq)
            {
                Console.WriteLine(string.Join("--", item.First(), item.Count()));
                //Console.WriteLine(item.First().ToString() + item.Count().ToString());             
            }
            Console.ReadLine();
        }
    }
}

My attempt at least !