Server Error in '/' Application.

Nullable object must have a value.

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: Nullable object must have a value.

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: Nullable object must have a value.]
   System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) +52
   System.Nullable`1.get_Value() +12842473
   Netmais.CPA2016v100.PageCore.RenderMenuLateral(Int32 theId) +1288
   Netmais.CPA2016v100.Page.PagePreRender() +225
   Netmais.CPA2016v100.PageCore.Page_PreRender(Object sender, EventArgs e) +37
   System.Web.UI.Control.OnPreRender(EventArgs e) +9906630
   System.Web.UI.Control.PreRenderRecursiveInternal() +88
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +883


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3062.0