Working with Booleans

I've started today with Visual Studio and I'm trying to work with Booleans.

I want to do following thing:

Click on a specific Button - Program opens - set a variable that the program is opened - if that's the case, it'll reopen the programm but close the current before (so the program is not opened twice)

I've already following code:

 private void button1_Click(object sender, EventArgs e)
    {

        bool status = false;
        if (status != true)
        {
            status = true;
            System.Diagnostics.Process.Start("C:\\Users\\David\\Desktop\\Test\\Test.exe");
        }

    }

Now my problems is, if I click always on the button, the variable is set on false as you can see on the first line. How I can do it correctly ?

Also, how I do return 0 if status is set on true?

Thanks for your time