public static string GenerateRandomString(int length)
        {
            var random = new Random();
            var result = new StringBuilder();
            const string chars = "QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm123456798!@#$%^&*()_+=-";
            for (int i = 0; i < length; i++)
            {
                var character = chars[random.Next(0, chars.Length)];
                result.Append(character);
            }
            return result.ToString();
        }