public void AddMassPoints( 
   IEnumerable<MapPoint> points,
   int tagValue,
   double z,
   SpatialReference spatialReference
)

{
  // Add points with no tag value and height = 17.
  // The points have the same spatial reference as the tin editor, so there is no need to provide it. 
  tinEditor.AddMassPoints(points, 0, 17);

  Coordinate3D[] coordinate3Ds = new Coordinate3D[] //Define some coordinates
  {
    new Coordinate3D(0,0,5),
    new Coordinate3D(1,1,6),
    new Coordinate3D(2,1,7)
  };
  // Add coordinates as nodes with tag value = 42. The height will come from the z-values of the coordinates.
  tinEditor.AddMassPointsZ(coordinate3Ds, 42);
  // Add z-aware points with tag value = 21. The height will come from the z-values of the points.
  // The points are in a different spatial reference than the tin editor, so we provide the spatial 
  // reference of the points. The points will be projected to the spatial reference of the tin editor.
  tinEditor.AddMassPointsZ(pointsZ, 21, SpatialReferenceBuilder.CreateSpatialReference(54004));
}