Html.X().Panel()
  .Title("Właściwości")
  .Header(true)
  .Flex(2)
  .Layout(LayoutType.Fit)
  .Items(builder2 => builder2.Add(
      Html.X().PropertyGrid()
          .SortableColumns(false)
          .CellCls("first-level")
          .Cls("first-level")
          //.Cls("asd")
          .Scroll(ScrollMode.None)
          .Header(false)
          .Source(collection => collection.AddRange(
              new PropertyGridParameterCollection
                  {

                      new PropertyGridParameter("nazwa","siemasz"),
                      new PropertyGridParameter("adres","długa wartioooooooość")
                  }))
          .Listeners(listeners => listeners.BeforeEdit.Fn = "DisableEdit")))