Silverlight How To: Bind control to inverse of Boolean property value

I recently had to bind a control's visibility to inverse of a Boolean property value. I implemented following converter to achieve it.

   1:  public class BoolToVisibilityConverter : IValueConverter

   2:  {

   3:   

   4:      #region IValueConverter Members

   5:   

   6:      // This method is called when the value from the property is propagated to the control.

   7:      public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

   8:      {

   9:          if (!(value is bool) || targetType != typeof(Visibility))

  10:              return false;

  11:          if (parameter == null)

  12:              return (bool)value ? Visibility.Visible : Visibility.Collapsed;

  13:          if (parameter is string && parameter.ToString() == "Inverse")

  14:              return (bool)value ? Visibility.Collapsed : Visibility.Visible;

  15:          return false;

  16:      }

  17:   

  18:      // This method is called the value from the control is propagated to the property. 

  19:      public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)

  20:      {

  21:          if (!(value is Visibility) || targetType != typeof(bool))

  22:              return false;

  23:          if (parameter == null)

  24:              return (Visibility)value == Visibility.Visible ? true : false;

  25:          if (parameter is string && parameter.ToString() == "Inverse")

  26:              return (Visibility)value == Visibility.Visible ? false : true;

  27:          return false;

  28:      }

  29:   

  30:      #endregion

  31:  }

Next add namespace to root XAML node

   1:  xmlns:converter="clr-namespace:yournamespace"

Then add converter class as a resource to XAML control

   1:  <UserControl.Resources>

   2:      <converter:BoolToVisibilityConverter x:Key="visibilityConverter" />

   3:  </UserControl.Resources>

And finally add data binding passing "Inverse" parameter value

   1:  <Button Content="MyButton" x:Name="MyButton" Visibility="{Binding YourProperty, Mode=TwoWay, Converter={StaticResource visibilityConverter}, ConverterParameter=Inverse}"/>

There could be multitude of IValueConverter implementations, perhaps better than this. This is what I came up with to get me going. Please feel free to comment and suggest.