C#

public partial class Form1 : Form, INotifyPropertyChanged
{
    bool _test;
    public bool Test
    {
        get { return _test; }
        set
        {
            _test = value;
            PropertyChangedEventHandler handler = this.PropertyChanged;
            if (null != handler)
                handler(this, new PropertyChangedEventArgs("Test"));
        }
    }

    public Form1()
    {
        Test = true;
        InitializeComponent();
        checkBox1.DataBindings.Add(new Binding("Checked", this, "Test"));
    }

    private void button1_Click(object sender, EventArgs e)
    {
        Test = !Test;
    }

    public event PropertyChangedEventHandler PropertyChanged;
}

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

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larsp777 wrote:

So do you have a solution to the problem or were just showing of?

larsp777 wrote:

If he has deleted the codebehind but still have the other files, can you past it in from another projekt?

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]