[SL4] Forzare il re-binding di un controllo

public static void ForceControlRebind(Control cntrl, DependencyProperty depprop) {     try     {         BindingExpression BindExp = cntrl.GetBindingExpression(depprop);         Binding Bind = BindExp.ParentBinding;         cntrl.SetBinding(depprop, Bind);     }     catch { } }