c# - Centering OK button within a MessageBox in winforms -

i learning c#, , part of wrote small app consists of form 2 groups of buttons, 2 buttons each. button closing of app added well. , works ok. there messagebox, showing app going closed. and here little problem bugs me: ok button within messagebox not centered horizontally. guess there method align button, puzzles me why it's not centered default? illustration here screenshots:

here code well:

using system; using system.drawing; using system.windows.forms;  public class myform : form {     private groupbox gboxgrp1;     private groupbox gboxgrp2;      private radiobutton butn1a;     private radiobutton butn1b;     private radiobutton butn2a;     private radiobutton butn2b;     private button btnclose;      public myform()     {         initializecomponent();     }      private void initializecomponent()     {         this.btnclose = new button();          this.gboxgrp1 = new groupbox();         this.gboxgrp2 = new groupbox();          this.butn1a = new radiobutton();         this.butn1b = new radiobutton();         this.butn2a = new radiobutton();         this.butn2b = new radiobutton();          //myform         this.text = "my form";         this.startposition = formstartposition.centerscreen;         this.height = 350;         this.width = 200;          //btnclose         this.controls.add(btnclose);         this.btnclose.text = "close";         this.btnclose.location = new point(60, 260);         this.btnclose.click += new eventhandler(btnclose_click);          //gboxgrp1         this.gboxgrp1.location = new point(20, 20);         this.gboxgrp1.text = "group box 1";         this.gboxgrp1.width = 150;         this.gboxgrp1.height = 100;          //gboxgrp2         this.gboxgrp2.text = "group box 2";         this.gboxgrp2.location = new point(20, 130);         this.gboxgrp2.width = 150;         this.gboxgrp2.height = 100;          //radio buttons         this.butn1a.text = "radio 1a";         this.butn1a.location = new point(30, 30);         this.butn1a.size = new size(90, 15);          this.butn1b.text = "radio 1b";         this.butn1b.location = new point(30, 60);         this.butn1b.size = new size(90, 15);          this.butn2a.text = "radio 2a";         this.butn2a.location = new point(30, 30);         this.butn2a.size = new size(90, 15);          this.butn2b.text = "radio 2b";         this.butn2b.location = new point(30, 70);         this.butn2b.size = new size(90, 15);          //controls         this.controls.add(gboxgrp1);         this.controls.add(gboxgrp2);          this.gboxgrp1.controls.add(butn1a);         this.gboxgrp1.controls.add(butn1b);         this.gboxgrp2.controls.add(butn2a);         this.gboxgrp2.controls.add(butn2b);     }      private void btnclose_click(object sender, eventargs e)     {         messagebox.show("closing application");         application.exit();     } }  public class myapp {     public static void main()     {         application.run(new myform());     } } 

you can't restyle default messagebox that's depends on windows os theme. create own message box creating new form , call using newmessagebox.showdialog();