System.Xml.Serialization.XmlSerializationReaderCodeGen.GetChoiceIdentifierSource C# (CSharp) Method

        private string GetChoiceIdentifierSource(MemberMapping[] mappings, MemberMapping member)
        {
            string choiceSource = null;
            if (member.ChoiceIdentifier != null)
            {
                for (int j = 0; j < mappings.Length; j++)
                {
                    if (mappings[j].Name == member.ChoiceIdentifier.MemberName)
                    {
                        choiceSource = "p[" + j.ToString(CultureInfo.InvariantCulture) + "]";
                        break;
                    }
                }
#if DEBUG
                    // use exception in the place of Debug.Assert to avoid throwing asserts from a server process such as aspnet_ewp.exe
                    if (choiceSource == null) throw new InvalidOperationException(SR.Format(SR.XmlInternalErrorDetails, "Can not find " + member.ChoiceIdentifier.MemberName + " in the members mapping."));
#endif

            }
            return choiceSource;
        }