windbg sos.dll version issue

I debugged a .net 1.1 based windows application which exits silently upon start up. The problem itself is trivial and not worth mentioning. What I want to say is there is a subtle point about sos.dll version. When I was debugging, I started the application under windbg. Then issue ".loadby sos mscorwks" command to load sos.dll extension corresponds to the running .net framework. And I entered !DumpAllExceptions command which should exist in sos.dll for .net framework 1.1, but ended in not finding this command:    No export DumpAllExceptions found Finally, I had to use "!DumpHeap -type Exception" to find out all exceptions. Having done some investigation, I found there are two sos.dll files for .net 1.1. One in .net framework installation folder, and one in windbg installation folder. The latter one is a full featured extension and support DumpAllExceptions command. I tried debugging the application again with sos.dll comes with windbg by issusing: ".load windbg_installation_folder/clr10/sos.dll". This time, DumpAllExceptions was back to life and worked like a charm. BTW, an alternative way to do !DumpAllExceptions is to take advantage of .foreach command.    .foreach(exception {!DumpHeap -type Exception -short}) {!do exception; .echo print exception done !!! *****************} For convenience, below are commands supported by different version sos.dll. C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\SOS.dll 0:000> !help SOS : Help COMState             | List COM state for each thread ClrStack             | Provides true managed stack trace, source and line numbers.                        Additional parameters: -p[arams] -l[ocals] -r[egs] -a[ll]. DumpClass      | Dump EEClass info DumpDomain []  | List assemblies and modules in a domain DumpHeap [-stat] [-min 100] [-max 2000] [-mt 0x3000000] [-type ] [-fix] [start [end]] | Dump GC heap contents DumpMD         | Dump MethodDesc info DumpMT [-MD]   | Dump MethodTable info DumpModule     | Dump EE Module info DumpObj        | Dump an object on GC heap DumpStack [-EE] [-smart] [top stack [bottom stack] | -EE only shows managed stack items. DumpStackObjects [top stack [bottom stack] DumpVC    | Dump a value class object EEHeap [-gc] [-win32] [-loader] | List GC/Loader heap info EEStack [-short] [-EE] | List all stacks EE knows EEVersion            | List mscoree.dll version FinalizeQueue [-detail]     | Work queue for finalize thread GCInfo [] [IP]   | Dump GC encoding info for a managed method GCRoot         | Find roots on stack/handle for object IP2MD          | Find MethodDesc from IP Name2EE | Find memory address of EE data given a class/method name ObjSize []     | Find number of bytes that a root or all roots keep alive on GC heap. ProcInfo [-env] [-time] [-mem] | Display the process info RWLock [-all] | List info for a Read/Write lock SyncBlk [-all|#]     | List syncblock ThreadPool           | Display CLR threadpool state Threads              | List managed threads Token2EE  | Find memory address of EE data for metadata token u [] [IP]        | Unassembly a managed code {windbg installation folder}\clr10\sos.dll 0:000> !help Did you know that a lot of exceptions (!dumpallexceptions) can cause memory problems. To see more tips, run !tip. ------------------------------------------------------------------------------- SOS is a debugger extension DLL designed to aid in the debugging of managed programs. Functions are listed by category, then roughly in order of importance. Shortcut names for popular functions are listed in parenthesis. Type "!help " for detailed info on that function. Object Inspection                  Examining code and stacks -----------------------------      ----------------------------- DumpObj (do)                       Threads (t) DumpAllExceptions (dae)            CLRStack DumpStackObjects (dso)             IP2MD DumpHeap (dh)                      U DumpVC                             DumpStack GCRoot                             EEStack ObjSize                            GCInfo FinalizeQueue                      COMState DumpDynamicAssemblies (dda)        X DumpField (df)                     SearchStack TraverseHeap (th) GCRef Examining CLR data structures      Diagnostic Utilities -----------------------------      ----------------------------- DumpDomain                         VerifyHeap (vh) EEHeap                             DumpLog Name2EE                            FindAppDomain SyncBlk                            SaveModule DumpASPNETCache (dac)              SaveAllModules (sam) DumpMT                             GCHandles DumpClass                          GCHandleLeaks DumpMD                             FindDebugTrue Token2EE                           FindDebugModules EEVersion                          Bp DumpSig                            ProcInfo DumpModule                         StopOnException (soe) ThreadPool (tp)                    TD ConvertTicksToDate (ctd)           Analysis ConvertVTDateToDate (cvtdd)        Bl RWLock                             CheckCurrentException (cce) DumpConfig                         CurrentExceptionName (cen) DumpHttpRuntime                    ExceptionBp DumpSessionStateConfig             FindTable DumpBuckets                        LoadCache DumpHistoryTable                   SaveCache DumpRequestTable                   ASPXPages DumpCollection (dc)                DumpGCNotInProgress DumpDataTables                     CLRUsage GetWorkItems                                                DumpLargeObjectSegments (dl)     DumpModule DumpAssembly                       Other DumpMethodSig                      ----------------------------- DumpRuntimeTypes                   FAQ PrintIPAddress DumpHttpContext DumpXmlDocument (dxd) C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\SOS.dll 0:000> !help ------------------------------------------------------------------------------- SOS is a debugger extension DLL designed to aid in the debugging of managed programs. Functions are listed by category, then roughly in order of importance. Shortcut names for popular functions are listed in parenthesis. Type "!help " for detailed info on that function. Object Inspection                  Examining code and stacks -----------------------------      ----------------------------- DumpObj (do)                       Threads DumpArray (da)                     CLRStack DumpStackObjects (dso)             IP2MD DumpHeap                           U DumpVC                             DumpStack GCRoot                             EEStack ObjSize                            GCInfo FinalizeQueue                      EHInfo PrintException (pe)                COMState TraverseHeap                       BPMD Examining CLR data structures      Diagnostic Utilities -----------------------------      ----------------------------- DumpDomain                         VerifyHeap EEHeap                             DumpLog Name2EE                            FindAppDomain SyncBlk                            SaveModule DumpMT                             GCHandles DumpClass                          GCHandleLeaks DumpMD                             VMMap Token2EE                           VMStat EEVersion                          ProcInfo DumpModule                         StopOnException (soe) ThreadPool                         MinidumpMode DumpAssembly                      DumpMethodSig                      Other DumpRuntimeTypes                   ----------------------------- DumpSig                            FAQ RCWCleanupList DumpIL