This constructor creates an arc using the values passed in. center must be in WCS coordinates. The arc is initialized with a normal of (0,0,1) and a thickness of 0.0.

Public Sub New(
    center As Point3d, 
    radius As double, 
    startAngle As double, 
    endAngle As double
)

public Arc(
    Point3d center, 
    double radius, 
    double startAngle, 
    double endAngle
);