Check opened FORM!

Question

I have a new problem! :(

My app have 2 form, I add a button to Form1 so as to open Form2. And now the problem appears, the more I click that button, the more Form2 are opened.

Ex: Click 10 times , 10 Form2 on the screen!

I'v tried this:

     Form2 formTwo = new Form2(); 

    if (formTwo.Visible == false) {formTwo.OpenDIalog();}

     else {formTwo.BringToFront();}

 

But it doesn't work! :(

I've also tried to set Enabled of that button properties to false after Form2 open. But it will make that button's text disapper. So please ignore this!

Is there a way to check if the form2 is opened or not to do different action

Expect model:

    if(Form2 is not opend)  {//Do not open again}

    else{open form2} //I know this, just need the red one