Error - The service youtube has thrown an exception. HttpStatusCode is

Question

Hi

  I am trying to get my Youtube Subscribers List.

Error - Message = The service youtube has thrown an exception. 
The requester is not allowed to access the requested subscriptions.

var searchRequest =yt.Search.List("snippet");
            searchRequest.ChannelId = "xyz";
            var searchResponse = searchRequest.Execute();

Thanks