This problem reared its ugly for me recently when logged-in users were losing their sessions because of activities elsewhere on the same system that were creating directories. Problem solved!
//FIX disable AppDomain restart when deleting subdirectory //This code will turn off monitoring from the root website directory. //Monitoring of Bin, App_Themes and other folders will still be operational, so updated DLLs will still auto deploy. System.Reflection.PropertyInfo p = typeof(System.Web.HttpRuntime).GetProperty("FileChangesMonitor", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static); object o = p.GetValue(null, null); System.Reflection.FieldInfo f = o.GetType().GetField("_dirMonSubdirs", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.IgnoreCase); object monitor = f.GetValue(o); System.Reflection.MethodInfo m = monitor.GetType().GetMethod("StopMonitoring", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic); m.Invoke(monitor, new object[] { });