wcf数据服务问题

您好，我在自己的应用程序中实现了wcf数据服务，但我却像这样出现错误找不到该网页.

实际上，我创建了如下这样的可查询方法名称

hi i implemented the wcf data service to my application and i am gettin error like this The webpage cannot be found .

actully i create iquerable method name like this follows

public class sample
{
sample()
{
}
 public IQueryable GetData()
        {
            System.Net.WebRequest request = System.Net.WebRequest.Create("url");
                      
             return methodname(arg1,ar2);//here actualy retuning the data as iqueryable and to another class
            //return null;
        }

public class MyCustomDataSource
   {
       public MyCustomDataSource()
       {
           sample s = new sample();
           s.GetData();

       }
   }

数据服务如下

the data service as follows

[System.ServiceModel.ServiceBehavior(IncludeExceptionDetailInFaults = true)]
       public class DataService : DataService< MyCustomDataSource >
   {
       // This method is called only once to initialize service-wide policies.
       public static void InitializeService(IDataServiceConfiguration config)
       {
           // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc.
           // Examples:
          config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);
           // config.SetServiceOperationAccessRule("MyServiceOperation", ServiceOperationRights.All);
         //config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;


       }

      protected override MyCustomDataSource CreateDataSource()
       {
           MyCustomDataSource source = new MyCustomDataSource();
           return source;
       }

   }

所以请任何人帮我解决该问题，因为这是公司分配的任务，我是实习生，我对此一无所知，所以请帮助并给我建议

so please anyone help me how can i resolve this since this is task assigned in company i am intern i don''t anything about this so please please help and give me suggestion please