Bubble sort, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

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

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var coll = new int[]{1,4,5,2,4,7,8,9,4,2,6,7};
            var count = Sort(coll);
            
            //Your code goes here
            foreach(var i in coll){
                Console.WriteLine(i);
            }
            
            Console.WriteLine("Counter:" + count);
        }
        
        public static int Sort(int[] coll)
        {
            var counter = 0;
            var len = coll.Length;
            for(var i = 0; i < len; i++){
                var isSorted = true;
                for(var j = 0; j < len - i - 1; j++){
                    if(coll[j] > coll[j+1]){
                        counter++;
                        Swap(ref coll[j], ref coll[j+1]);
                        isSorted = false;
                    }
                }
                if(isSorted) break;
            }
            
            return counter;
        }
        
        private static void Swap(ref int i, ref int j){
            var temp = i;
            i = j;
            j = temp;
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,16 sec, absolute running time: 0,09 sec, cpu time: 0,08 sec, average memory usage: 15 Mb, average nr of threads: 3