如何通过AO接口将JSON串转为要素类？

            string jsonfeatureSet = {\displayFieldName\:\\,\fieldAliases\:{\OBJECTID\:\OBJECTID\,\fld\:\fld\},\geometryType\:\esriGeometryPoint\,\spatialReference\:{\wkid\:102100},\fields\:[{\name\:\OBJECTID\,\type\:\esriFieldTypeOID\,\alias\:\OBJECTID\},{\name\:\fld\,\type\:\esriFieldTypeString\,\alias\:\fld\,\length\:50}],\features\:[ +

            { +

             \geometry\: { +

                \x\: 940411.3699657875, +

                \y\: 5643498.120243863, +

                \spatialReference\: {\wkid\: 102100} +

              }, +

              \attributes\: { +

                \OBJECTID\: 1, +

                \fld\: \中文\ +

              } +

            }]};



            IJSONReader jsonReader = new JSONReaderClass();

            jsonReader.ReadFromString(jsonfeatureSet);



            IJSONConverterGdb JSONConverterGdb = new JSONConverterGdbClass();

            IPropertySet ppOriginalToNewFieldMap;

            IRecordSet pRecorset;

            JSONConverterGdb.ReadRecordSet(jsonReader, null, null, out pRecorset, out ppOriginalToNewFieldMap);



            Type factoryType = Type.GetTypeFromProgID(esriDataSourcesGDB.FileGDBWorkspaceFactory);

            IWorkspaceFactory workspaceFactory = (IWorkspaceFactory)Activator.CreateInstance(factoryType);

            IWorkspace workspace = workspaceFactory.OpenFromFile(@C:\scratch.gdb, 0);

            IRecordSet2 recordSet2 = pRecorset as IRecordSet2;

            recordSet2.SaveAsTable(workspace, json2fc);