System.NullReferenceException: Object reference not set to an instance of an object. at TanmiaWPS_New.DisplayByCategory.DisplayByCategoryUserControl.GetMostRecentlyAddedFile(SPFolder folder) at TanmiaWPS_New.DisplayByCategory.DisplayByCategoryUserControl.<>c__DisplayClass2_0.b__0() at Microsoft.SharePoint.Utilities.SecurityContext.RunAsProcess(CodeToRunElevated secureCode) at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(WaitCallback secureCode, Object param) at Microsoft.SharePoint.SPSecurity.RunWithElevatedPrivileges(CodeToRunElevated secureCode) at TanmiaWPS_New.DisplayByCategory.DisplayByCategoryUserControl.BindArticles(String catID) مجلة التنمية الإدارية Articles
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