Sharepoint 2010-SearchServiceApplicationProxy

/// <summary>

        /// import profile pic from pubhub to root site

        /// </summary>

        /// <param name="searchQuery"></param>

        /// <returns></returns>

        public static bool ImportContacts(string searchQuery)

        {

            var searchDt = new DataTable(); bool isImport = false;

            SPSecurity.RunWithElevatedPrivileges(delegate()

            {

                SearchServiceApplicationProxy proxy =

                    SearchServiceApplicationProxy.GetProxy(

                        SPServiceContext.GetContext(SPContext.Current.Site)) as SearchServiceApplicationProxy;

                if (proxy == null) throw new ArgumentNullException("SearchServiceApplicationProxy is null");

                var keywordQuery = new KeywordQuery(proxy)

                {

                    ResultsProvider = SearchProvider.Default,

                    ResultTypes = ResultType.RelevantResults,

                    TrimDuplicates = false,

                    HiddenConstraints = "scope:\"MyContacts\"",

                    RowLimit = 500

                };

             

                keywordQuery.SelectProperties.Add("Title");

                keywordQuery.SelectProperties.Add("Path");

                keywordQuery.SelectProperties.Add("PictureThumbnailURL");

                keywordQuery.SelectProperties.Add("PicOwner");

                keywordQuery.SelectProperties.Add("PicOwnerEmail");

                ResultTableCollection fullTextSearchResults = keywordQuery.Execute();

                if (fullTextSearchResults.Exists(ResultType.RelevantResults))

                {

                    ResultTable searchResult = fullTextSearchResults[ResultType.RelevantResults];

                    searchDt.Load(searchResult, LoadOption.OverwriteChanges);

                    if (searchDt.Rows.Count > 0)

                    {

                        //insert data to list

                        insertToRootList(searchDt);

                        isImport = true;

                    }

                }

            }); return isImport;

        

        }