[InvalidOperationException: Sequence contains no elements]
System.Linq.Enumerable.Single(IEnumerable`1 source) +316
System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__3(IEnumerable`1 sequence) +40
System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle(IEnumerable`1 query, Expression queryRoot) +60
System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +113
System.Data.Entity.Internal.Linq.DbQueryProvider.Execute(Expression expression) +113
System.Linq.Queryable.Single(IQueryable`1 source, Expression`1 predicate) +249
DotNetPortal.Core.Business.ForumPostService.GetFirstPostOfThread(ForumThreadBO thread) in d:\Work\DotNetPortal\Current\src\DotNetPortal\DotNetPortal.Core\Business\ForumPostService.cs:85
DotNetPortal.Core.Business.ForumThreadService.GetById(Int32 id) in d:\Work\DotNetPortal\Current\src\DotNetPortal\DotNetPortal.Core\Business\ForumThreadService.cs:88
DotNetPortal.Web.ForumThread.FillControl() in d:\Work\DotNetPortal\Current\src\DotNetPortal\DotNetPortal.Web\ForumThread.aspx.cs:55
DotNetPortal.Web.ForumThread.Page_Load(Object sender, EventArgs e) in d:\Work\DotNetPortal\Current\src\DotNetPortal\DotNetPortal.Web\ForumThread.aspx.cs:37
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +85
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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