WebApiTest.JsonpFormatter.GetJsonCallbackFunction C# (CSharp) Method

        private string GetJsonCallbackFunction(HttpRequestMessage request)
        {
            if (request.Method != HttpMethod.Get)
            return null;

               var query = HttpUtility.ParseQueryString(request.RequestUri.Query);
               var queryVal = query[this.JsonpParameterName];

               if (string.IsNullOrEmpty(queryVal))
            return null;

               return queryVal;
        }