public HttpResponseMessage GetMyFriendCount(string id)
        {
            if (ValidationService.AuthorizeToken(GetToken(), "get:/api/volunteer/myfriendcount?id=") == false)
            {
                return(new HttpResponseMessage {
                    StatusCode = HttpStatusCode.Unauthorized, Content = new StringContent("无访问权限", System.Text.Encoding.GetEncoding("UTF-8"), "application/text")
                });
            }
            Guid myId   = new Guid(id);
            int  result = FriendService.FindMyFriends(myId).Count;

            return(new HttpResponseMessage {
                Content = new StringContent(result.ToString(), System.Text.Encoding.GetEncoding("UTF-8"), "application/text")
            });
        }