Server Error in '/' Application.

Sequence contains no elements

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Sequence contains no elements

Source Error:


Line 15:         using (GearBoxEntities Grb=new GearBoxEntities())
Line 16:         {
Line 17:             var query = (from fa in Grb.Facilities
Line 18:                         where fa.FacilityId == FacilityId
Line 19:                         select fa

Source File: d:\hostingspaces\gearboxautomat.ir\httpdocs\FacilityContent.aspx.cs    Line: 17

Stack Trace:


[InvalidOperationException: Sequence contains no elements]
   System.Linq.Enumerable.Single(IEnumerable`1 source) +320
   System.Data.Objects.ELinq.<>c__11`1.<GetElementFunction>b__11_3(IEnumerable`1 sequence) +43
   System.Data.Objects.ELinq.ObjectQueryProvider.ExecuteSingle(IEnumerable`1 query, Expression queryRoot) +61
   System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +134
   System.Linq.Queryable.Single(IQueryable`1 source) +220
   FacilityContent.Page_Load(Object sender, EventArgs e) in d:\hostingspaces\gearboxautomat.ir\httpdocs\FacilityContent.aspx.cs:17
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0