Steps to reproduce

NpgsqlPolygon polygon = new NpgsqlPolygon();
polygon.Add(new NpgsqlPoint(1, 1));//throw NullReferenceException

The issue

Default constructor not overridden in NpgsqlPolygon type.
I expect existing this constructor:

public NpgsqlPolygon()
{
    _points = new List<NpgsqlPoint>();
}

Is there a reason why this is not done?

Further technical details

Npgsql version: 7.0.4
PostgreSQL version: PostgreSQL 15.2, compiled by Visual C++ build 1914, 64-bit
Operating system:
Edition Windows 10 Pro
Version 22H2
OS build 19045.3086