Default constructor. Constructs an open polyline with linetype generation off and initializes the start and end widths to 0.0, the bulge to 0.0, the elevation to 0.0, the type to SimplePoly, the normal to (0,0,1), and the thickness to 0.0.

Public Sub New()
Public Sub New(
    type As Autodesk.AutoCAD.DatabaseServices.Poly2dType, 
    vertices As Point3dCollection, 
    elevation As double, 
    closed As [MarshalAs(UnmanagedType.U1)] bool, 
    startWidth As double, 
    endWidth As double, 
    bulges As DoubleCollection
)

public Polyline2d();
public Polyline2d(
    Autodesk.AutoCAD.DatabaseServices.Poly2dType type, 
    Point3dCollection vertices, 
    double elevation, 
    [MarshalAs(UnmanagedType.U1)] bool closed, 
    double startWidth, 
    double endWidth, 
    DoubleCollection bulges
);