Stroke vs Brush serialization?

[overflowing]

I'm curious why is there native Stroke serialization but for Brushes we have to manually serialize them?

e.g.:

http://ninjatrader.com/support/helpGuides/nt8/en-us/?brushes.htm

Stroke property:

[Display(ResourceType = typeof(Custom.Resource), 
Name = "MyStroke", Order = 4, GroupName = "NinjaScriptParameters")]
public Stroke MyStroke { get; set; }

Brush property:

[XmlIgnore]
public Brush MyBrush { get; set; }

[Browsable(false)]
public string MyBrushSerialize
{
   get { return Serialize.BrushToString(MyBrush); }
   set { MyBrush = Serialize.StringToBrush(value); }
}

[NinjaTrader_DaveI]

Hello,

Brushes do not lend themselves to direct serialization, since they are a bit more complex than simple Types. That is why we added the helper methods BrushToString and StringToBrush to assist in serializing and deserializing these objects.

With Strokes, you will be using our own implementation (NinjaTrader.Gui.Stroke), and we are doing our own serialization logic on its properties under the hood, so no helper method is needed in this specific case.