Opc.Ua.X509AuthorityKeyIdentifierExtension.TrimHexString C# (CSharp) Method

        private string TrimHexString(string hex)
        {
            int i = 0;
            string result = "";
            while (i < hex.Length)
            {
                if (Char.IsLetterOrDigit(hex[i]))
                {
                    result += Char.ToUpper(hex[i]);
                }
                i++;
            }
            return result;
        }