The result from extruded polyline triangulation: a triangle mesh defined using an indexed triangle list with top and bottom boundary positions. The mesh is commonly visualized with the Triangle Mesh Primitive or Surface Mesh Primitive. The boundaries are commonly visualized with the Polyline Primitive.

BottomBoundaryPositions	Gets the boundary positions along the bottom of the extrusion. Three array elements (in the order x, y, z) constitute one position.
BoundaryPositionsWindingOrder	Gets the winding order of Top Boundary Positions and Bottom Boundary Positions.
TopBoundaryPositions	Gets the boundary positions along the top of the extrusion. Three array elements (in the order x, y, z) constitute one position.

IAgStkGraphicsExtrudedPolylineTriangulatorResult Members  | Triangle Mesh Primitive Overview - Triangulators  | IAgStkGraphicsExtrudedPolylineTriangulatorInitializer  | IAgStkGraphicsTriangleMeshPrimitive  | IAgStkGraphicsSurfaceMeshPrimitive  | IAgStkGraphicsPolylinePrimitive