出现“索引超出范围。必须为非负值并小于集合大小。”的错误！还请帮忙看看，谢谢！
string serviceName = "Kingdee.BOS.WebApi.ServicesStub.DynamicFormService.Save";
object[] saveInfo = new object[] { "BD_Account",
"{"FACCTID":0,"FCreateOrgId":{"FOrgID":0,"FNumber":"103","FName":""},"FCurrencyList":"","FCURRENCYS":"","FUseOrgId":{"FOrgID":0,"FNumber":"103","FName":""},"FFullName":"其他应付款_房租Test1","FNumber":"2241.05","FHelperCode":"2241.05","FName":"房租Test1","FDC":"-1","FITEMDETAILID":{"FID":0,"FNumber":"12","FName":""},"FGROUPID":{"FACCTTYPEID":0,"FNumber":"FZ","FName":"","FACCTGROUPID":{"FACCTGROUPID":0,"FNUMBER":"1002","FNAME":"String"}},"FDescription":"String","FParentID":{"FACCTID":0,"FCurrencyList":"","FNumber":"1511","FName":"","FAllCurrency":false},"FACCTTBLID":{"FACCTTABLEID":0,"FNumber":"PRE01","FName":""},"FCFItemID":{"FID":0,"FNumber":"","FName":""},"FIsCash":false,"FLevel":2,"FAllCurrency":false,"FCFIndirectItemId":{"FID":0,"FNumber":"","FName":""},"FISCASHFLOW":false,"FOCFItemID":{"FID":0,"FNumber":"","FName":""},"FIsBank":false,"FOCFIndirectItemId":{"FID":0,"FNumber":"","FName":""},"FIsAllocate":false,"FIsQty":false,"FUNITGROUPID":{"FUNITGROUPID":0,"FNUMBER":"","FNAME":""},"FUnitId":{"FUNITID":0,"FNumber":"","FName":"","FUnitGroupId":{"FUNITGROUPID":0,"FNUMBER":"","FNAME":""},"FPrecision":0,"FRoundType":"","BD_Account_BD_UNIT__SubHeadEntity":{"FConvertType":""}},"FISDETAIL":false,"FCreatorId":{"FUserID":0,"FUserAccount":"100006","FName":""},"FModifierId":{"FUserID":0,"FUserAccount":"100006","FName":""},"FAuditorID":{"FUserID":0,"FUserAccount":"100006","FName":""},"FForbidderID":{"FUserID":0,"FUserAccount":"","FName":""},"FDocumentStatus":"A","FIsSysPreset":false,"FCreateDate":"2016/3/9 13:42:09","FModifyDate":"2016/3/9 13:42:09","FAuditDate":"2016/3/9 13:42:09","FForbidDate":"","FForbidStatus":"C"}}"}
var retSave = client.Execute