Programmatically add an item to a custom content type in SharePoint 2010

I have a custom list named "Test" which has the following content types

1. Item
2. TestCT

I want to add an item to TestCT content type using SharePoint object model.

Code Snippet:

using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.SharePoint;   namespace Console {     class Program     {         static void Main(string[] args)         {             using (SPSite site = new SPSite("http://serverName:41491/sites/Vijai/"))             {                 using (SPWeb web = site.OpenWeb())                 {                                        SPList list = web.Lists.TryGetList("Test");                     if (list != null)                     {                         SPContentType ct = list.ContentTypes["TestCT"];                         SPListItem item = list.Items.Add();                         item["Title"] = "newitem";                         item["ContentTypeId"] = ct.Id;                         item.Update();                     }                 }             }         }     } }