C# Destroying the effects of a class -

i have public class puzzle creates puzzle of buttons (a 2d array of buttons) , places them in form1 of windows form application(it sets form1 parent). when call function remove these buttons except reset_button, delete half of them. have call method n times in order these buttons deleted, n x n = number of buttons puzzle has.

public void remove(form g)         {             (int i=0; i<n;i++)             foreach (button b in g.controls)             {                 if (b.name!="btn_reset") b.dispose();             }         } 

in form1 class puzzle new instance of class puzzle, , remove public method within class puzzle

btn_reset.mouseclick += (ss, ee) =>             {                 puzzle.remove(this);                 //puzzle=new puzzle(n,this);             }; 

any idea why happens?

you not removing buttons disposing them. suggest code:

public void remove(form g) {     var toremove = g.controls.oftype<button>().where(x => x.name != "btn_reset").tolist();     foreach(button b in toremove)     {         g.controls.remove(b);     } } 

please note:

• you have create new list of controls (toremove in example) because cannot directly iterate on controls , remove items list.
• you have add using system.linq;

update: stated other users, dispose removes controls parent. actual problem not call dispose way used iterator .so use code

public void remove(form g) {     var toremove = g.controls.oftype<button>().where(x => x.name != "btn_reset").tolist();     foreach(button b in toremove)     {         b.dispose();     } }