/// <summary>
/// When implemented in a derived class, returns an object that is provided
/// as the value of the target property for this markup extension.
///
/// When a XAML processor processes a type node and member value that is a markup extension,
/// it invokes the ProvideValue method of that markup extension and writes the mResult into the
/// object graph or serialization stream. The XAML object writer passes service context to each
/// such implementation through the serviceProvider parameter.
/// </summary>
/// <param name="serviceProvider"></param>
/// <returns></returns>
public override object ProvideValue(IServiceProvider serviceProvider)
{
if (converter == null)
{
converter = new ActiveDocumentToVisibilityConverter();
}
return(converter);
}
/// <summary>
/// When implemented in a derived class, returns an object that is provided
/// as the value of the target property for this markup extension.
///
/// When a XAML processor processes a type node and member value that is a markup extension,
/// it invokes the ProvideValue method of that markup extension and writes the mResult into the
/// object graph or serialization stream. The XAML object writer passes service context to each
/// such implementation through the serviceProvider parameter.
/// </summary>
/// <param name="serviceProvider"></param>
/// <returns></returns>
public override object ProvideValue(IServiceProvider serviceProvider)
{
return(_converter ?? (_converter = new ActiveDocumentToVisibilityConverter()));
}