Visio VB -> C#

[Tim Bücker]

I´ve got a short and simple question but I am afraid only a few people know the answer.
In a visio automation code I´ve seen a code like this:

nRows = shpObj.RowCount (Visio.visSecti onProp)

Unfortunately there is no Visio.visSectio nProp in C#.
What is its aquivalent in C#?

Thanks A LOT for any help.
Greetings,
Tim.