C# Bubble Sort, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Microsoft (R) Visual C# Compiler version 2.9.0.63208 (958f2354)

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

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
           int[] arr = { 5, 8, 1, 8, 4, 5, 6, 5, 4 };

Console.WriteLine("Bubble Sort");
            Console.Write("Start array: ");
            arr.ToList().ForEach(x => Console.Write(x + " "));

//sort

int temp;

for(int i = 0; i < arr.Length - 1; i++)
            {
                for(int j = 0; j < arr.Length - (1 + i); j++)
                {
                    if(arr[j] > arr[j + 1])
                    {
                        temp = arr[j + 1];
                        arr[j + 1] = arr[j];
                        arr[j] = temp;
                    }
                }
            }
           
            Console.Write("\nSorted array: ");
            arr.ToList().ForEach(x => Console.Write(x + " "));

}
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,44 sec, absolute running time: 0,09 sec, cpu time: 0,08 sec, average memory usage: 13 Mb, average nr of threads: 2, absolute service time: 0,55 sec