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# PolyNode.IsHole

Del.» IsHole: Boolean; //read only

C++ » bool IsHole; //field

C# » public bool IsHole; //read only property

Returns true when the PolyNode's polygon (Contour) is a hole.
Children of outer polygons are always holes, and children of holes are always (nested) outer polygons.
The IsHole property of a PolyTree object is undefined but its children are always top-level outer polygons.

## See Also

Overview, Contour, PolyTree

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