private void RunMessageLoopInner(int reason, ApplicationContext context)
{
      bool flag2;
      if ((reason == 4) && !SystemInformation.UserInteractive)
      {
            throw new InvalidOperationException(SR.GetString("CantShowModalOnNonInteractive"));
      }
      if (reason == -1)
      {
            this.SetState(8, false);
      }
      if (Application.ThreadContext.totalMessageLoopCount++ == 0)
      {
            Application.ThreadContext.baseLoopReason = reason;
      }
      ++this.messageLoopCount;
      if (reason == -1)
      {
            if (this.messageLoopCount != 1)
            {
                  throw new InvalidOperationException(SR.GetString("CantNestMessageLoops"));
            }
            this.applicationContext = context;
            this.applicationContext.ThreadExit += new EventHandler(this.OnAppThreadExit);
            if (this.applicationContext.MainForm != null)
            {
                  this.applicationContext.MainForm.Visible = true;
            }
      }
      Form form1 = this.currentForm;
      if (context != null)
      {
            this.currentForm = context.MainForm;
      }
      bool flag1 = false;
      if ((reason == 4) || (reason == 5))
      {
            flag1 = true;
            if ((this.currentForm != null) && this.currentForm.IsHandleCreated)
            {
                  SafeNativeMethods.IsWindowEnabled(new HandleRef(this.currentForm, this.currentForm.Handle));
            }
            this.BeginModalMessageLoop();
            this.currentForm.Visible = true;
      }
      try
      {
            if (this.messageLoopCount == 1)
            {
                  this.InstallWindowsFormsSyncContextIfNeeded();
            }
            if ((this.ComponentManager is Application.ComponentManager))
            {
                  flag2 = this.ComponentManager.FPushMessageLoop(this.componentID, reason, 0);
                  return;
            }
            flag2 = this.LocalModalMessageLoop(((reason == 2) ? null : this.currentForm));
            return;
      }
      finally
      {
            if (flag1)
            {
                  this.EndModalMessageLoop();
            }
            this.currentForm = form1;
            --Application.ThreadContext.totalMessageLoopCount;
            --this.messageLoopCount;
            if (this.messageLoopCount == 0)
            {
                  new NamedPermissionSet("FullTrust").Assert();
                  try
                  {
                        AsyncOperationManager.OperationSynchronizationContext = this.previousSyncContext;
                  }
                  finally
                  {
                        CodeAccessPermission.RevertAssert();
                        this.previousSyncContext = null;
                  }
            }
            if (reason == -1)
            {
                  this.Dispose(true);
            }
            else if ((this.messageLoopCount == 0) && (this.componentManager != null))
            {
                  this.RevokeComponent();
            }
      }
}