[CONNECT .NET Addin] Set color, weight, and linestyle "ByLevel"

In V8i addins I could easily set the color, weight, and linestyle to bylevel using:

Element.Color = -1

Element.Weight = -1

Element.LineStyle = ByLevelLineStyle

How do you achieve the same results in CONNECT? I know you use the ElementPropertiesSetter but can't figure out the "bylevel" value to use:

ElementPropertiesSetter.SetColor(??)

ElementPropertiesSetter.SetWeight(??)

ElementPropertiesSetter.SetLinestyle(??,??)