private static void AppendPolygon(StringBuilder sb, IPolygon poly)
{
if (poly == null || poly.RingCount == 0)
{
return;
}
bool first = true;
for (int i = 0; i < poly.RingCount; i++)
{
IRing r = poly[i];
if (r != null && r.PointCount > 2)
{
if (!first)
{
sb.Append(",");
}
r.ClosePath();
AppendPointCollection(sb, r);
first = false;
}
}
}