code: public void suspend()
      {
          if (tc.isEntryEnabled()) Tr.entry(tc, "suspend");
  
          if (tc.isEventEnabled()) Tr.event(tc, "suspending (global)");
          _suspendedUOW = _tranManager.suspend();
  
          if (tc.isEntryEnabled()) Tr.exit(tc, "suspend", _suspendedUOWType);
      }
docs: Suspend any transaction context off the thread - save the LTC in the wrapper