/// <summary>
/// Gets all non-boundary points from a TopographySurface or Subregion.
/// </summary>
/// <param name="toposurface">The TopographySurface or Subregion.</param>
/// <returns>The non-boundary points.</returns>
public static IList <XYZ> GetNonBoundaryPoints(TopographySurface toposurface)
{
return(toposurface.GetInteriorPoints());
}