C#中，调试错误类型是不实现借口成员，代码如下？

Question

namespace TMSM.Business[ClassInterface(ClassInterfaceType.AutoDispatch)][AutoComplete]public interface TicketBasicBusiness : ServicedComponent,ITicketBasic{[AutoComplete]public DataTable GetEnquiryInfo(string TicketType, string OutAgentNum, string BTicketNo, string FTicketNo){EnquiryEntityManager buyentitymanager = new EnquiryEntityManager();DataTable dt = new DataTable();try{dt = buyentitymanager.GetEnquiryInfo(TicketType,OutAgentNum,BTicketNo,FTicketNo);return dt;}catch (Exception exp){throw exp;}}#region ITicketBasic 成员public DataTable GetBuyInfo(string TicketType, string OutAgentNum, string BTicketNo, string FTicketNo){throw new NotImplementedException();}#endregion}}===================================第四行 public interface TicketBasicBusiness出现错误什么原因怎么改？