[InvalidOperationException: Sequence contains no elements]
System.Linq.Enumerable.First(IEnumerable`1 source) +405
SamiEfendi.DuyuruGoster.Yukle() in C:\My_Project\Genel\BİTEN İŞLER\SamiEfendi\SamiEfendi\DuyuruGoster.aspx.cs:26
SamiEfendi.DuyuruGoster.Page_Load(Object sender, EventArgs e) in C:\My_Project\Genel\BİTEN İŞLER\SamiEfendi\SamiEfendi\DuyuruGoster.aspx.cs:22
System.Web.UI.Control.OnLoad(EventArgs e) +106
System.Web.UI.Control.LoadRecursive() +68
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3785
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