AutocompleteMenuNS.AutocompleteMenu.SetAutocompleteMenu C# (CSharp) Method

        public void SetAutocompleteMenu(Control control, AutocompleteMenu menu)
        {
            if (menu != null)
            {
                var wrapper = menu.CreateWrapper(control);
                if (wrapper == null) return;
                //
                menu.SubscribeForm(wrapper);
                AutocompleteMenuByControls[control] = this;
                //
                wrapper.LostFocus += menu.control_LostFocus;
                wrapper.Scroll += menu.control_Scroll;
                wrapper.KeyDown += menu.control_KeyDown;
                wrapper.MouseDown += menu.control_MouseDown;
            }
            else
            {
                AutocompleteMenuByControls.TryGetValue(control, out menu);
                AutocompleteMenuByControls.Remove(control);
                ITextBoxWrapper wrapper = null;
                WrapperByControls.TryGetValue(control, out wrapper);
                WrapperByControls.Remove(control);
                if (wrapper != null && menu != null)
                {
                    wrapper.LostFocus -= menu.control_LostFocus;
                    wrapper.Scroll -= menu.control_Scroll;
                    wrapper.KeyDown -= menu.control_KeyDown;
                    wrapper.MouseDown -= menu.control_MouseDown;
                }
            }
        }

 private static void SetAutoComplete(IEnumerable<AutocompleteItem> items, AutocompleteMenu completemenu,
     Control tb)
 {
     completemenu.SetAutocompleteMenu(tb, completemenu);
     completemenu.SetAutocompleteItems(items);
 }