c# - Know When Child Form Closed -

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i've form1 button. when click button, code block executes:

form2 frm = new form2(); frm.name = "form" + musterinumarasi.tostring(); frm.text = "kullanıcı - " + musterinumarasi.tostring();

lets i've clicked 3 times. there 4 forms now: main, child1, child2, child3. when user closes 1 of child forms, main form needs know 1 closed. how can that?

subscribe closed event 

form2 frm = new form2();     frm.formclosed += new formclosedeventhandler(form_closed);  void form_closed(object sender, formclosedeventargs e) {     form2 frm = (form2)sender;     messagebox.show(frm.name); }

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