@if (visible) { } @code { string key = "textBox"; TextBox textBox; CPF.Controls.Button button; bool visible = false; string text = "test"; List list = new List() { "1","2","3" }; ListBox listBox; object test = "test"; bool enable; void OnMouseDown(CPF.Input.MouseButtonEventArgs e) { //enable = visible; button.IsEnabled = visible; text = "test" + visible; visible = !visible; list.Add(list.Count.ToString()); test = list.Count; } void TextChanged() { } protected override void OnInitialized() { base.OnInitialized(); } }