System.Xml.Serialization.SoapSchemaImporter.ImportGroupMembers C# (CSharp) Method

        void ImportGroupMembers(XmlSchemaParticle particle, CodeIdentifiers members, string ns) {
            XmlQualifiedName parentType = XmlSchemas.GetParentName(particle);
            if (particle is XmlSchemaGroupRef) {
                throw new InvalidOperationException(Res.GetString(Res.XmlSoapUnsupportedGroupRef, parentType.Name, parentType.Namespace));
            }
            else if (particle is XmlSchemaGroupBase) {
                XmlSchemaGroupBase group = (XmlSchemaGroupBase)particle;
                if (group.IsMultipleOccurrence)
                    throw new InvalidOperationException(Res.GetString(Res.XmlSoapUnsupportedGroupRepeat, parentType.Name, parentType.Namespace));
                for (int i = 0; i < group.Items.Count; i++) {
                    object item = group.Items[i];
                    if (item is XmlSchemaGroupBase || item is XmlSchemaGroupRef)
                        throw new InvalidOperationException(Res.GetString(Res.XmlSoapUnsupportedGroupNested, parentType.Name, parentType.Namespace));
                    else if (item is XmlSchemaElement)
                        ImportElementMember((XmlSchemaElement)item, members, ns);
                    else if (item is XmlSchemaAny) 
                        throw new InvalidOperationException(Res.GetString(Res.XmlSoapUnsupportedGroupAny, parentType.Name, parentType.Namespace));
                }
            }
        }