[InvalidOperationException: Sequence contains no elements]
System.Linq.Enumerable.Single(IEnumerable`1 source) +317
Geos.MercatinoUsato.PublicWebsite.Vetrina.Categoria.Page_Init(Object sender, EventArgs e) in C:\Dati\Progetti\Geos\Geos.MercatinoUsato-LIVE\Website\Geos.MercatinoUsato.PublicWebsite\Vetrina\Categoria.aspx.cs:29
System.Web.UI.Control.OnInit(EventArgs e) +108
System.Web.UI.Page.OnInit(EventArgs e) +17
Geos.MercatinoUsato.WebEngine.UI.PageBase.OnInit(EventArgs e) in C:\Dati\Progetti\Geos\Geos.MercatinoUsato-LIVE\Website\Geos.MercatinoUsato.WebEngine\UI\PageBase.cs:56
System.Web.UI.Control.InitRecursive(Control namingContainer) +11726003
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +491
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