using System.Security.Cryptography;

using System.Text;

using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(GetShortUrlKey());

    }

​

    public static string GetShortUrlKey()

    {

        char[] Base32Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".ToCharArray();

        var bytes = new byte[8]; // 40-bit rastgele veri üret (yaklaşık 8 Base32 karakteri)

        RandomNumberGenerator.Fill(bytes);

        var key = new StringBuilder(8);

        for (int i = 0; i < bytes.Length; i++)

        {

            key.Append(Base32Chars[bytes[i] % Base32Chars.Length]);

        }

​

        return key.ToString();

    }

}