[InvalidOperationException: Collection was modified; enumeration operation may not execute.]
System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) +60
System.Collections.Generic.Enumerator.MoveNext() +14545127
System.Linq.WhereEnumerableIterator`1.MoveNext() +74
System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +475
System.Linq.Enumerable.ToList(IEnumerable`1 source) +73
FoPrintHandler.Helper.FoPCache.RemoveOldItemsFromCache() in C:\src\trunk\utilitytools\FopTransfo\FoPrintHandler\App_Code\Helper\FoPCache.cs:93
FoPrintHandler.Helper.FoPCache.TryHandleRequestFromCache(HttpContext context, FileTypeHelperData ft, Parameters param) in C:\src\trunk\utilitytools\FopTransfo\FoPrintHandler\App_Code\Helper\FoPCache.cs:127
FoPrintHandler.Converter.FoPImplementation.HandleApacheFoPGeneric(HttpContext context, Func`2 summonMemoryStream, FileTypeHelperData fth, Parameters param, Boolean useCache) in C:\src\trunk\utilitytools\FopTransfo\FoPrintHandler\App_Code\Converter\FoPImplementation.cs:198
FoPrintHandler.Converter.FoPImplementation.HandleRequest(HttpContext context, Parameters param) in C:\src\trunk\utilitytools\FopTransfo\FoPrintHandler\App_Code\Converter\FoPImplementation.cs:110
FoPrintHandler.FoPMeta.ProcessRequest(HttpContext context) in C:\src\trunk\utilitytools\FopTransfo\FoPrintHandler\FoPMeta.ashx.cs:29
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +542
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +93
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