how to use multiple order by in LINQ?

I want to use multiple order by in my query, and i am using LINQ.i am new to LINQ, i have tried the examples given on stackoverflow. but i dont know why these are not working for me , i am sure i am wrong some where. below is my situation. I got a project in which created using LINQ. I have little task to set order of column. Actually what is my task there is a column created date by which its ordering now. Now i want to use Createddate as well a sortOrder column for ordering.Below is code used for it: Code in page load method ``` ViewState["SortDirection"] = "desc"; ViewState["SortColumn"] = "createddate"; BindAllTopics(ViewState["SortDirection"].ToString(), ViewState["SortColumn"].ToString()); ``` And my BindAllTopic Method is as bellow: ``` protected void BindAllTopics(string SortType, string SortColumn) { var LstTopics = (from topic in Dbobj.T_topic select topic).ToList(); if (LstTopics.Count() > 0) { if (SortType == "ASC") { LstTopics = LstTopics.OrderBy(q => q.Name).ToList(); } else { LstTopics = LstTopics.OrderByDescending(q => q.Name).ThenBy(q => q.SortOrder).ToList(); } GrdTopics.DataSource = LstTopics.ToList(); GrdTopics.PageSize = 25; GrdTopics.DataBind(); } else { GrdTopics.DataSource = null; GrdTopics.DataBind(); lblMsg.DisplayMessage(StatusMessages.InfoMessage, "No Topics Found."); } } ``` I want to sort it firstly by sortorder which is of int type and then by Createddate. Please help me..