bool InternalCanImport(XmlSchemaSet schemas, ICollection<XmlQualifiedName> typeNames, ICollection<XmlSchemaElement> elements, XmlQualifiedName[] elementTypeNames)
 {
     DataContractSet oldValue = (dataContractSet == null) ? null : new DataContractSet(dataContractSet);
     try
     {
         SchemaImporter schemaImporter = new SchemaImporter(schemas, typeNames, elements, elementTypeNames, DataContractSet, ImportXmlDataType);
         schemaImporter.Import();
         return true;
     }
     catch (InvalidDataContractException)
     {
         dataContractSet = oldValue;
         return false;
     }
     catch (Exception ex)
     {
         if (Fx.IsFatal(ex))
         {
             throw;
         }
         dataContractSet = oldValue;
         TraceImportError(ex);
         throw;
     }
 }
        void InternalImport(XmlSchemaSet schemas, ICollection<XmlQualifiedName> typeNames, ICollection<XmlSchemaElement> elements, XmlQualifiedName[] elementTypeNames/*filled on return*/)
        {
            if (DiagnosticUtility.ShouldTraceInformation)
            {
                TraceUtility.Trace(TraceEventType.Information, TraceCode.XsdImportBegin, SR.GetString(SR.TraceCodeXsdImportBegin));
            }

            DataContractSet oldValue = (dataContractSet == null) ? null : new DataContractSet(dataContractSet);
            try
            {
                SchemaImporter schemaImporter = new SchemaImporter(schemas, typeNames, elements, elementTypeNames/*filled on return*/, DataContractSet, ImportXmlDataType);
                schemaImporter.Import();

                CodeExporter codeExporter = new CodeExporter(DataContractSet, Options, GetCodeCompileUnit());
                codeExporter.Export();
            }
            catch (Exception ex)
            {
                if (Fx.IsFatal(ex))
                {
                    throw;
                }
                dataContractSet = oldValue;
                TraceImportError(ex);
                throw;
            }

            if (DiagnosticUtility.ShouldTraceInformation)
            {
                TraceUtility.Trace(TraceEventType.Information, TraceCode.XsdImportEnd, SR.GetString(SR.TraceCodeXsdImportEnd));
            }
        }