opening a window form from another form programmatically

Question

I am making a Windows Forms application. I have a form. I want to open a new form at run time from the original form on a button click. And then close this

Answer 1

private void btnchangerate_Click(object sender, EventArgs e)
    {
        this.Hide();  //current form will hide
        Form1 fm = new Form1(); //another form will open
        fm.Show();


    }

on click btn current form will hide and new form will open