New form disappear after creation

Question

I'm facing a problem with form show. I have a main form where I have my GUI and I choose an option that creates an instance of a form. For example in my main form I have:

Form2 f2 = new Form2();
f2.Show();

The problem is that the form shows for about 1-2 secs and then goes behind the main form.

I tried some instructions in the main form below f2.Show() command like

f2.BringtoFront();
this.SendtoBack();

Also I added commands to the new form ( Form2 ) load method:

this.BringtoFront();
this.Activate();
this.Focus();

Nothing of the above commands seems to be a solution for this. Only when I use f2.ShowDialog(); instruction in my main form but I don't want to do that because I need immediate access to both of these forms at the same time.

Any help? Thanks

Answer 1

If you don't want your second form to never go behind your main form then pass the owner in the overload of Show method that accepts the owner parameter

 Form2 f2 = new Form2();
 f2.Show(this);   // Assuming this code runs inside the main form

Answer 2

If you remove or change it to comment this.SendtoBack(); :

f2.BringtoFront();
//this.SendtoBack();

it'll be OK!