public static SecureString EncodeForXMLElementValue()

in src/PFXImportPowershell/EncryptionUtilities/Source/SecureStringUtil.cs [246:294]
44 lines of code
8 McCabe index (conditional complexity)

        public static SecureString EncodeForXMLElementValue(SecureString inputString)
        {
            if (inputString == null)
            {
                throw new ArgumentNullException(nameof(inputString));
            }

            SecureString retString = new SecureString();
            IntPtr inputPtr = IntPtr.Zero;

            try
            {
                inputPtr = Marshal.SecureStringToGlobalAllocUnicode(inputString);

                for (int inputOffset = 0; inputOffset < inputString.Length * 2; inputOffset += 2)
                {
                    char curInputChar = (char)Marshal.ReadInt16(inputPtr, inputOffset);

                    switch (curInputChar)
                    {
                        case '&':
                            AppendToSecureString(retString, "&amp;");
                            break;
                        case '\'':
                            AppendToSecureString(retString, "&apos;");
                            break;
                        case '<':
                            AppendToSecureString(retString, "&lt;");
                            break;
                        case '>':
                            AppendToSecureString(retString, "&gt;");
                            break;
                        case '"':
                            AppendToSecureString(retString, "&quot;");
                            break;
                        default:
                            retString.AppendChar(curInputChar);
                            break;
                    }
                }
            }
            finally
            {
                Marshal.ZeroFreeGlobalAllocUnicode(inputPtr);
                inputPtr = IntPtr.Zero;
            }

            return retString;
        }