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？