SharePoint By Gaurav Goyal

You can change Created By column value or Modified By column value. To do this use below given code :             using (SPSite site = new SPSite(SPContext.Current.Web.Url))             {                 using (SPWeb web = site.OpenWeb())                 {                     SPList list = web.Lists.TryGetList("MyList");                     SPListItem item = list.GetItemById(1);                     web.AllowUnsafeUpdates = true;                     //You can use user id (integer)                      //item[SPBuiltInFieldId.Author] = SPContext.Current.Web.CurrentUser.ID; ...