How to get behavior like a radio button group so only one item can be selected

Question

I made a user control and placed it in a panel. The user control has its own mouse click event that changes color. If I click on a control on the panel, I want the other controls to be deselected. Like radio buttons. How can I do that?

Here is a picture of my panel. There is both of two user controls is selected.

public partial class list : UserControl
{
    void chgtxt(Label lbl, string s)
    {
        lbl.Text = s;
    }

    public list()
    {
        InitializeComponent();
    }

    private void panel1_MouseClick(object sender, MouseEventArgs e)
    {
        panel1.BackColor = Color.Yellow;
        chgtxt(label1, "Changed");
    }
}

Answer 1

You can enumerate the panel's children and deselect the ones that aren't the current control:

foreach (list listControl in Parent.Controls.Cast<Control>().OfType<list>())
{
    if (list != this)
    {
        list.Deselect();
    }
}

Then you just have to create a Deselect() method on your control:

public void Deselect()
{
    // Do whatever to show this control as deselected.
}

Answer 2

To expand on itsme86's answer , you need to look at the parent control your control is part of and deselect the other items in the list.

public partial class list : UserControl
{
    void chgtxt(Label lbl, string s)
    {
        lbl.Text = s;
    }

    public list()
    {
        InitializeComponent();
    }

    private void panel1_MouseClick(object sender, MouseEventArgs e)
    {
        panel1.BackColor = Color.Yellow;
        chgtxt(label1, "Changed");

        if(this.Parent != null)
        {    
            foreach (list listControl in this.Parent.Controls.Cast<Control>().OfType<list>())
            {
                if (listControl != this)
                {
                    listControl.Deselect();
                }
            }
        }
    }

    private void Deselect()
    {
        // Do whatever to show this control as deselected.
    }
}