How to convert 3dpolyline to solid ？

1

I have lots of polyline making as markline，then convert to 3dpolyline ，elevation for corridor surface ，finaly convert it to solid 。 how to do it ？thank you 。

2

I want to make markline model import to infraworks。

3

Please add some of your work. What have you done in Dynamo so far?
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