AppVeyor.UI.Common.DropDownButton.DropDownButton C# (CSharp) Method

        public DropDownButton()
        {
            // Bind the ToogleButton.IsChecked property to the drop-down's IsOpen property

            Binding binding = new Binding("DropDown.IsOpen");
            binding.Source = this;
            SetBinding(IsCheckedProperty, binding);
        }