Caught Exception: System.ArgumentException: Illegal characters in path.
at System.IO.Path.CheckInvalidPathChars(String path, Boolean checkAdditional)
at System.IO.Path.GetExtension(String path)
at URLHelper.GetCurrentURL(HttpContext context) in d:\html\users\userweb38\Html\App_Code\URLHelper.cs:line 191
at URLHelper.Application_BeginRequest(Object source, EventArgs e) in d:\html\users\userweb38\Html\App_Code\URLHelper.cs:line 24
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)