[InvalidOperationException: Sequence contains no matching element]
System.Linq.Enumerable.First(IEnumerable`1 source, Func`2 predicate) +444
XHWeb.ArticleFile.Page_Load(Object sender, EventArgs e) in D:\MaverStation\WorkShop\Medjaden\Solution\XHWebSolution\XHWeb\ArticleFile.aspx.cs:41
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +154
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4082
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