Dxf read Hatch boundary error

[chihsiliu1966]

private HatchBoundaryPath ReadEdgePolylineBoundaryPath()
{
HatchBoundaryPath.Polyline poly = new HatchBoundaryPath.Polyline();

this.chunk.Next();

bool hasBulge = this.chunk.ReadShort() != 0; // code 72
this.chunk.Next();

// is polyline closed
// poly.IsClosed = this.chunk.ReadShort() != 0; // code 73, this value must always be true
this.chunk.Next();

int numVertexes = this.chunk.ReadInt(); // code 93
poly.Vertexes = new Vector3[numVertexes];
this.chunk.Next();

for (int i = 0; i < numVertexes; i++)
{
    double bulge = 0.0;
    double x = this.chunk.ReadDouble(); // code 10
    this.chunk.Next();
    double y = this.chunk.ReadDouble(); // code 20
    this.chunk.Next();
    if (hasBulge)
    {
        bulge = this.chunk.ReadDouble(); // code 42
        this.chunk.Next();
    }
    poly.Vertexes[i] = new Vector3(x, y, bulge);
}
poly.IsClosed = true;//kai????  <----  add this line
HatchBoundaryPath path = new HatchBoundaryPath(new List<HatchBoundaryPath.Edge> {poly});

// read all referenced entities
Debug.Assert(this.chunk.Code == 97, "The reference count code 97 was expected.");
int numBoundaryObjects = this.chunk.ReadInt();
this.hatchContours.Add(path, new List<string>(numBoundaryObjects));
this.chunk.Next();
for (int i = 0; i < numBoundaryObjects; i++)
{
    Debug.Assert(this.chunk.Code == 330, "The reference handle code 330 was expected.");
    this.hatchContours[path].Add(this.chunk.ReadString());
    this.chunk.Next();
}

return path;

}