Đã google đủ kiểu nhưng mà vẫn không ăn thua. Ai có cao kiến gì không ạ
An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is:
System.InvalidOperationException: An exception was thrown in a call to a WSDL export extension: System.ServiceModel.Description.DataContractSerializerOperationBehavior
contract: http://tempuri.org/:IUnimOsService ----> System.Runtime.Serialization.InvalidDataContractException: Property 'Item' in type 'TruongViet.UnimOs.Entity.XL_TKBInfo' cannot be serialized because serialization of indexed properties is not supported.
at System.Runtime.Serialization.DataContract.DataContractCriticalHelper.ThrowInvalidDataContractException(String message, Type type)
at System.Runtime.Serialization.ClassDataContract.ClassDataContractCriticalHelper.ImportDataMembers()
at System.Runtime.Serialization.ClassDataContract.ClassDataContractCriticalHelper..ctor(Type type)
