How do I create another instance of a .NET program within one instance by code?

Question

I need to be able to create another brand new instance of a program on a button click while keeping the existing instance.

this.ShowDialog(new Form1());

The above statement causes the current form to be the owner of the new form and I need the second instance to be independent of the existing instance.

Can anyone help me with this?

are you trying to create a new instance of a Program or of a Form? — Adam
– Adam, Commented Jul 4, 2012 at 16:32
actually it is the other way around - newly created form1 becomes the owner of the current form. It does not happen, however, since the new instance is not made visible. — alexm
– alexm, Commented Jul 4, 2012 at 16:33

Mark Hall · Accepted Answer · 2012-07-04 16:53:05Z

5

To expound on Desolator's answer here is a simplistic example you can try a Form and a Button:

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

    private void button1_Click(object sender, EventArgs e)
    {
        Process p = new Process();
        p.StartInfo.FileName = Application.ExecutablePath;
        p.Start();
    }
}

answered Jul 4, 2012 at 16:53

Mark Hall

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score 5 · Accepted Answer · 2012-07-04 16:37:06Z

5

You can use instead new Form1().Show();, but when your current instances exists, the other one will exit too. So, to be fully independent, it is better to use System.Diagnostics.Process.Start(string path) which starts your program exactly as if one double clicks it.

edited Jul 4, 2012 at 16:37

answered Jul 4, 2012 at 16:31

user586399

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Tilak · Accepted Answer · 2012-07-04 16:33:51Z

0

(new Form1()).Show();

(new Form1()).Show();

answered Jul 4, 2012 at 16:33

Tilak

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