Microsoft Dynamics 365

1)       Create contract class Example Code: [Microsoft.Dynamics.BusinessPlatform.SharedTypes. InternalUseOnlyAttribute , DataContractAttribute ( 'TANVehicleMasterDataContract' )] class TANVehicleMasterDataContract {     SalesAgreementId     salesAgreementId;     TANVehicleCategory   vehicleCategory;     TANVehicleFuelType   fuelType;     int                  vehicleID;     TANPlateNo           plateNo;     TANMake              make;     TANModel             model;     TAN_RFID_Gatex       RFIDGatex;     TANOdometer_Gatex    odometerGatex;     int total;       [DataMemberAttribute( "TotalCount" )]     public int parmTotalCount( int _total = total)     {         total = _total;         return total;     }       [DataMemberAttribute( "SalesAgreementId" )]     public SalesAgreementId parmsalesAgreementId( TANVehicleCategory _salesAgreementId = salesAgreementId)     {         salesAgreementId = _sale