Opc.Ua.CertificateIdentifier.GetDisplayName C# (CSharp) Method

        private static string GetDisplayName(X509Certificate2 certificate)
        {
            if (!String.IsNullOrEmpty(certificate.FriendlyName))
            {
                return certificate.FriendlyName;
            }

            string name = certificate.Subject;

            // find the common name delimiter.
            int index = name.IndexOf("CN", StringComparison.Ordinal);

            if (index == -1)
            {
                return name;
            }

            StringBuilder buffer = new StringBuilder(name.Length);

            // skip characters until finding the '=' character
            for (int ii = index + 2; ii < name.Length; ii++)
            {
                if (name[ii] == '=')
                {
                    index = ii + 1;
                    break;
                }
            }

            // skip whitespace.
            for (int ii = index; ii < name.Length; ii++)
            {
                if (!Char.IsWhiteSpace(name[ii]))
                {
                    index = ii;
                    break;
                }
            }

            // read the common until finding a ','.
            for (int ii = index; ii < name.Length; ii++)
            {
                if (name[ii] == ',')
                {
                    break;
                }

                buffer.Append(name[ii]);
            }

            return buffer.ToString();
        }