Dim segType As SegmentType = myLwPolyline.GetSegmentType(i)
If segType = SegmentType.Arc Then
Dim myArc As Autodesk.AutoCAD.Geometry.CircularArc3d = myLwPolyline.GetArcSegmentAt(i)
myLength = myArc.GetLength(myArc.GetParameterOf(myArc.StartPoint), myArc.GetParameterOf(myArc.EndPoint), 0)
myRadius = myArc.Radius
End If
Next
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