[InvalidOperationException: Sequence contains no elements]
System.Linq.Enumerable.First(IEnumerable`1 source) +405
System.Data.Objects.ELinq.<>c__11`1.<GetElementFunction>b__11_0(IEnumerable`1 sequence) +39
System.Data.Objects.ELinq.ObjectQueryProvider.ExecuteSingle(IEnumerable`1 query, Expression queryRoot) +60
System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +134
System.Linq.Queryable.First(IQueryable`1 source) +211
it_scheda.Page_Load(Object sender, EventArgs e) in D:\inetpub\webs\andromedafortedeimarmiit\it\scheda.aspx.vb:28
System.Web.UI.Control.OnLoad(EventArgs e) +79
System.Web.UI.Control.LoadRecursive() +130
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2853
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