C#, How to Consistantly bring a form to the front?

Question

I have a MainForm Class Instance, I bring up another form like so;

InputForm MyInput= new InputForm("Enter a Number");
MyInput.ShowDialog();

I close MyInput form from within itself like this;

    private void Button_Click(object sender, EventArgs e)
    {
        //Do things here
        this.Hide();

    }

Flow resumes in the MainForm and using either

this.Show();

or

this.Activate();

neither will consistantly bring the MainForm to the front. How can I do this?

Answer 1

What you need to do is show your InputForm like this. This form of ShowDialog assigns the owner to your dialogbox.

DialogResult dr = MyInput.ShowDialog(this);
//test for result here

MyInput.Close();

Answer 2

this.Hide() appears to be hiding the main form, not the input. Because ShowDialog is a blocking method, the InputForm will need to be closed by user action, code internal to the InputForm, or by another thread.