WPF Custom Properties User Control

ExampleUserControl.cs

public class ExampleUserControl : UserControl
{
    #region Properties

    #region - Bindable Property Declaration

    public static readonly DependencyProperty ExampleTextProperty = 
        DependencyProperty.Register(
            nameof(ExampleText), 
            typeof(string),
            typeof(ExampleUserControl
            ), 
            new UIPropertyMetadata(
                string.Empty,
                ExampleTextPropertyChanged)
    );

    #endregion - Bindable Property Declaration

    #region - Bindable Properties

    public string ExampleText
    {
        get { return GetValue(ExampleTextProperty).ToString(); }
        set { SetValue(ExampleTextProperty, value); }
    }

    #endregion - Bindable Properties

    #region - Class Properties

    private Button _button;

    #endregion - Class Properties

    #endregion Properties

    public ExampleUserControl ()
    {
        _button = new Button() { Content = "Placeholder" };

        this.Content = _button;
    }

    #region Methods

    #region - Binded Property Changed Methods

    private static void ExampleTextPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        ExampleUserControl
         control = (ExampleUserControl
        )d;

        control._button.Content = d.GetValue(ExampleTextProperty) as string;

        //string value = d.GetValue(ExampleTextProperty) as string;

        //_button.Content = value;
    }

    #endregion - Binded Property Changed Methods

    #endregion Methods
}