TabSet

See the TabSetDemo class.

if (Gui.TextButton("Add Tab"))
{
    // Adds a new tab with the next index as its label
    tabs.Add(tabs.Count.ToString());
}

if (Gui.TextButton("Remove Tab"))
{
    // Removes the last tab
    tabs.Remove(((tabs.Count - 1).ToString()));
}

// Begin drawing the TabSet.
if (Gui.BeginTabSet(tabs.Count))
{
    for (int i = 0; i < tabs.Count; i++)
    {
        // Begin drawing the Tab.
        // Must be executed between BeginTabSet() and EndTabSet().
        if (Gui.BeginTab(tabs[i]))
        {
            Gui.Text($"{i}");
            Gui.EndTab();
        }
    }

    // End the TabSet.
    Gui.EndTabSet();
}