✅ How do I change background color of a label from a different namespace part of my app?

     Form mainForm = new Form1();
            Application.Run(mainForm);

Trouble with Windows Forms, in method "SetCompatibleTextRenderingDefault"

    public class MainForm
    {
        Form mainForm = new Form1();
    }

          MainForm formInstance = new();
            Application.Run(formInstance.mainForm);

    internal class GSPApi
    {
        public void ConnectToGSP()
        {

 Label label2 = (Label)Application.OpenForms["Form1"].Controls["label2"];
                    label2.BackColor = Color.Yellow;

class SocketController
{
  private readonly MainForm _form;

  public SocketController(MainForm form)
  {
    _form = form;
  }

  private void OnConntected()
  {
    _form.Label.BackColor = Color.Yellow;
  }
}

public Form MainForm
{
  private readonly SocketController _socket;

  public MainForm()
  {
    // initialize

    _socket = new(this);
  }
}