public ColorScaleCriterion MidpointThreshold {get;}
The midpoint threshold is only supported for a ColorScaleConditionalFormat instance with a value of 'ThreeColor' specified for the colorScaleType parameter.
Attempting to set a property on the instance returned from this property will cause an exception to be thrown if this instance was created as a 2-color scale.
The following value types are not valid for the midpoint threshold, and will cause an exception to be thrown:
Target Platforms: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+