CatalogContentType GetCurrentContentType()

{
  //Gets the Catalog pane
  var catalogWindow = Project.GetCatalogPane() as ICatalogWindow;
  var catContentType = catalogWindow.GetCurrentContentType();
  // use catContentType;
}

{
  //Gets the Catalog pane
  var catalogWindow = Project.GetCatalogPane() as ICatalogWindow;
  if (!catalogWindow.IsActiveWindow)
  {
    //catalog dockpane must be the active window
  }

  //Change the content to whatever is the next tab
  var catContentType = (int)catalogWindow.GetCurrentContentType();
  catContentType++;

  if (catContentType > (int)CatalogContentType.Favorites)
    catContentType = (int)CatalogContentType.Project;

  //Must be on the UI - no QueuedTask!
  catalogWindow.SetContentTypeAsync((CatalogContentType)catContentType);
}

{
  //Gets the Catalog pane
  var catalogWindow = Project.GetCatalogPane() as ICatalogWindow;
  if (!catalogWindow.IsActiveWindow)
  {
    //catalog dockpane must be the active window
  }

  var catContentType = catalogWindow.GetCurrentContentType();
  //Is portal content being shown?
  if (catContentType == CatalogContentType.Portal)
  {
    //check what is the portal content type being shown...
    var portalContentType = (int)catalogWindow.GetCurrentSecondaryPortalContentType();
    //advance to the next tab
    portalContentType++;
    if (portalContentType > (int)CatalogSecondaryPortalContentType.LivingAtlas)
      portalContentType = (int)CatalogSecondaryPortalContentType.UserContent;

    //set the secondary portal content type
    //Must be on the UI - no QueuedTask!
    catalogWindow.SetSecondaryPortalContentTypeAsync(
      (CatalogSecondaryPortalContentType)portalContentType);
  }
}