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 A = new List<int> { -1, 3, -4, 5, 1, -6, 2, 1 };
            BubbleSort(A);
        }
        //Bubble Sort
        public static void BubbleSort(List<int> items)
        {
            int i, j, temp;
            if (items == null)
                return;

for (i = items.Count - 1; i >= 0; i--)
            {
                for (j = 1; j <= i; j++)
                {
                    if (items[j - 1] > items[j])
                    {
                        temp = items[j - 1];
                        items[j - 1] = items[j];
                        items[j] = temp;
                    }
                }
            }

foreach (var item in items)
            {
                Console.Write(" " + item.ToString());
            }
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,12 sec, absolute running time: 0,08 sec, cpu time: 0,08 sec, average memory usage: 12 Mb, average nr of threads: 3