C# facebook tag page on photo

I need consultation on tagging page on photo, programatically (C#). Below is the code I am using in my web application to tag user on the photo. Note: This is server side code. **************************************************************** var me = (IDictionary<string, object>)[login to view URL]("me"); var id = (string)me["id"]; PhotoTag tags = new PhotoTag { x = "50", y = "50", tag_uid = id }; List<PhotoTag> tagList = new List<PhotoTag>() { tags }; JavaScriptSerializer oseializer = new JavaScriptSerializer(); var tagparameters = [login to view URL](tagList); IDictionary<string, object> upload = new Dictionary<string, object>(); [login to view URL]("@[login to view URL]", [login to view URL]); [login to view URL]("tags", tagparameters); [login to view URL]([login to view URL]("{0}/photos", id), upload); **************************************************************** But I want to know how we can tag page (fan page) on the photo. (We can manually tag page on any photo) I tried to use the page id but didnt worked.