'宣言 Public MustOverride ReadOnly Property PointsLocations As System.Collections.Generic.List(Of LonLat(Of String))
'使用法 Dim instance As LayerBase Dim value As System.Collections.Generic.List(Of LonLat(Of String)) value = instance.PointsLocations
public abstract System.Collections.Generic.List<LonLat<string>> PointsLocations {get;}