/// <summary>
/// Initializes a new instance of the <see cref="Polygon" /> class.
/// </summary>
/// <param name="coordinates">
/// The linear rings with the first element in the array representing the exterior ring.
/// Any subsequent elements represent interior rings (or holes).
/// </param>
public Polygon(IEnumerable <LineString> coordinates)
{
Coordinates = new ReadOnlyCollection <LineString>(
coordinates?.ToArray() ?? throw new ArgumentNullException(nameof(coordinates)));
if (Coordinates.Any(linearRing => !linearRing.IsLinearRing()))
{
throw new ArgumentException("All elements must be closed LineStrings with 4 or more positions" +
" (see GeoJSON spec at 'https://tools.ietf.org/html/rfc7946#section-3.1.6').", nameof(coordinates));
}
}
