c# - Dynamically looping through controls has no effect -

i have gui class. pass frmmain (form) gui contructor. have following method access child controls:

public void assignevents(frmmain frm) {     foreach (control ctl in frm.controls)     {         ctl.backcolor = color.greenyellow;         log.adddata(ctl.name.tostring() + ".backcolor = " + ctl.backcolor.tostring(), 3);     } } 

i new updated color in output (log), takes no effect on controls , still in default color. ideas i'm doing wrong?

edit:

i call this:

    // gui.cs     public class gui {          public gui(frmmain frm){              assignevents(frm);          }     }      // frmmain.cs     public frmmain()     {         initializecomponent();         gui  = new m.gui (this);     } 

based on comment, need try go recursively through each controlcollection set backcolor property.

try changing code this:

public gui(frmmain frm) {   assignevents(frm.controls); }  public void assignevents(control.controlcollection controls) {   foreach (control ctl in controls) {     ctl.backcolor = color.greenyellow;     assignevents(ctl.controls);   } }