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:



An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[InvalidOperationException: Sequence contains no elements]
   System.Linq.Enumerable.First(IEnumerable`1 source) +405
   KCCheckin.Public.KidCheck.Scheduler.schedulevolunteers.rgList_ItemCommand(Object sender, GridCommandEventArgs e) in C:\ProgramData\Jenkins\.jenkins\workspace\Pipelines\Build KidCheck.Net\webroot\KidCheck\Scheduler\schedulevolunteers.aspx.cs:612
   Telerik.Web.UI.RadGrid.OnItemCommand(GridCommandEventArgs e) +129
   Telerik.Web.UI.RadGrid.OnBubbleEvent(Object source, EventArgs e) +61
   System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +50
   Telerik.Web.UI.GridItem.OnBubbleEvent(Object source, EventArgs e) +117
   Telerik.Web.UI.RadGrid.RaisePostBackEvent(String eventArgument) +439
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5028