c# - change property of rad controls in form -

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how can access property of rad controls in form. code bellow

foreach (control ctrl in this.controls)   {    radcontrol rc = ctrl radcontrol;     if (rc != null)        {            if (rc.gettype() == typeof(telerik.wincontrols.ui.radbutton))             {               rc.image = ....             }      }  }

thanks

in conditional statement want test if (ctrl radcontrol)

and want make recursive function go down through control collections in page.

private void dosomethingtoradcontrols(controlcollection controls) {   if (controls != null && controls.any()) {     foreach (control ctrl in controls) {       if (ctrl radcontrol) {         //       }       dosomethingtoradcontrols(ctrl.controls);     }   } }

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