I'm Working Entity Frame Work 5 I Have An Error Of My Code

See more:

EF5.0

error message:
'System.Web.HttpContext' does not contain a definition for 'SaveChanges' and no extension method 'SaveChanges' accepting a first argument of type 'System.Web.HttpContext' could be found (are you missing a using directive or an assembly reference?)

code here


ChatMessage_tbl newchatting = objChatting;
using (ChatingEntities context = new ChatingEntities())
{
context.ChatMessage_tbl.Add(newchatting);

Context.SaveChanges();
}