Програми для обліку

class Program
{
   public static void Main()
   {
      Application.Init();
      _ = new MyWindow();
      
      CssProvider provider = new CssProvider();
      provider.LoadFromPath("style.css");
      StyleContext.AddProviderForScreen(Gdk.Screen.Default, provider, 800);
      
      Application.Run();
   }
}

TreeView TreeViewGrid = new TreeView();
TreeViewGrid.StyleContext.AddClass("report");

treeview.report {
    font: 10px Sans;
    margin: 0;
    padding: 0;
    border-color: darkgrey;
}