Compile and Execute C# Sharp Online

using System.IO;
using System;

class Program
{
    static void Main()
    {
        int value = 511;
        Console.WriteLine("value={0}, SetBits={1}", value, CountSetBits(value));
    }
    
    static public int CountSetBits(int value)
    {
        int x = value;
        x = (x & 0x55555555) + ((x >> 1) & 0x55555555);
        x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
        x = (x & 0x0F0F0F0F) + ((x >> 4) & 0x0F0F0F0F);
        x = (x & 0x00FF00FF) + ((x >> 8) & 0x00FF00FF);
        x = (x & 0x0000FFFF) + ((x >> 16)& 0x0000FFFF);
        return x;
    }
}