[InvalidOperationException: Sequence contains no elements]
System.Linq.Enumerable.First(IEnumerable`1 source) +455
XHWeb.InfoTree.Page_Load(Object sender, EventArgs e) in D:\MaverStation\WorkShop\Medjaden\Solution\XHWebSolution\XHWeb\InfoTree.aspx.cs:27
System.EventHandler.Invoke(Object sender, EventArgs e) +0
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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