WPF Slider - Change ScaleKind programatically in C#

How do I go about changing the ScaleKind programatically in C#? The WPF properties look simple enough but I don't see a way to map this to C# as SkaleKind doesn't appear anywhere in the list of "intellisense" options.

<ni:SliderDouble...         

  <ni:SliderDouble.Scale>               

    <ni:NumericScale ScaleKind="Linear"/>           

  </ni:SliderDouble.Scale>

or           

  <ni:SliderDouble.Scale>               

    <ni:NumericScale ScaleKind="LogarithmBase10"/>           

  </ni:SliderDouble.Scale>