Server Error in '/' Application.

Collection was modified; enumeration operation may not execute.

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: Collection was modified; enumeration operation may not execute.

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: Collection was modified; enumeration operation may not execute.]
   System.Collections.ArrayListEnumeratorSimple.MoveNext() +14493847
   umbraco.NodeFactory.Node.GetProperty(String Alias) +245
   umbraco.NodeExtensions.HasProperty(INode node, String propertyAlias) +22
   ITF.WebApps.Presentation.Web.Cup.UserControls.<>c.<OnLoad>b__0_1(INode n) +54
   System.Linq.<>c__DisplayClass6_0`1.<CombinePredicates>b__0(TSource x) +29
   System.Linq.WhereListIterator`1.MoveNext() +82
   System.Linq.Buffer`1..ctor(IEnumerable`1 source) +258
   System.Linq.<GetEnumerator>d__1.MoveNext() +208
   System.Linq.Enumerable.Count(IEnumerable`1 source) +221
   ITF.WebApps.Presentation.Web.Cup.UserControls.NavigationTop.OnLoad(EventArgs e) +560
   System.Web.UI.Control.LoadRecursive() +90
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Control.LoadRecursive() +185
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1533


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