CoderLab’s Blog

using System.Security.Cryptography;
using System.Text;
 
namespace UniqueKey
{
    public class KeyGenerator
    {
 
        public string GetUniqueKey()
        {
 
            int maxSize = 8;
            char[] chars = new char[62];
 
            chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890".ToCharArray();
            byte[] data = new byte[1];
 
            RNGCryptoServiceProvider crypto = new RNGCryptoServiceProvider();
            crypto.GetNonZeroBytes(data);
            data = new byte[maxSize];
            crypto.GetNonZeroBytes(data);
            StringBuilder result = new StringBuilder(maxSize);
 
            foreach (byte b in data)
            {
                result.Append(chars[b % (chars.Length - 1)]);
            }
 
            return result.ToString();
        }
    }
}