Why can't a boolean conversion be converted to visibility in a binding without having to create a BooleanToVisibilityConverter?

It seems odd that a binding cannot convert a boolean to default visibility without having to provide a BooleanToVisibilityConverter all the time. Does anyone know why?

Update

I found a way to do it now:

Create a TypeConverter like this:

public class VisibilityFromBooleanConverter : TypeConverter
{
  public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
  {
    if (sourceType == typeof(Boolean)) return true;
    return base.CanConvertFrom(context, sourceType);
  }

  public override object ConvertFrom(ITypeDescriptorContext context,
    System.Globalization.CultureInfo culture, object value)
  {
    if (value is Boolean) return ((Boolean)value) ? Visibility.Visible :
      Visibility.Collapsed;
    return base.ConvertFrom(context, culture, value);
  }

      

        
        
        
      

    

}

And add this to your application:

TypeDescriptor.AddAttributes(typeof(Visibility),
  new TypeConverterAttribute(typeof(VisibilityFromBooleanConverter)));

      

        
        
        
      

    

Everything seems to work fine. Now you don't need to supply BooleanToVisibilityConverter for every boolean binding.