C-Sharp Label aus anderer Klasse heraus ändern

namespace Test
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        klasse2 abc = new klasse2(this);

        private void button1_Click(object sender, EventArgs e)
        {
            abc.doCradyStuff();
        }
    }
}

{
    class klasse2
    {
	private Form _Parent;
	public klasse2(Form Parent)
	{
           _Parent = Parent;
	}
        public void doCradyStuff()
        {
            _Parent.label1.text = "Test";  
        }
    }
}

amespace Test
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        klasse2 abc = new klasse2();

        private void button1_Click(object sender, EventArgs e)
        {
            abc.doCradyStuff(this);
        }
    }
}

{
    class klasse2
    {
        public void doCradyStuff(Form Parent)
        {
            Parent.label1.text = "Test";  
        }
    }
}