public static WGS84Position ToWgs84(this RT90Position pos)
 {
     return(pos.ToWGS84());
 }
 public static SWEREF99Position ToSweRef99(this RT90Position pos)
 {
     return(new SWEREF99Position(pos.ToWGS84(), SWEREF99Position.SWEREFProjection.sweref_99_tm));
 }