public static AreaUnit Hectares {get;}

// convert 2 hectares to acres
double acres = AreaUnit.Hectares.ConvertTo(2, AreaUnit.Acres);

// convert 300 hectares to square miles
double sqMiles = AreaUnit.Hectares.ConvertTo(300, AreaUnit.SquareMiles);

double sqMetersPerUnit = AreaUnit.Acres.SquareMetersPerUnit;
sqMetersPerUnit = AreaUnit.Ares.SquareMetersPerUnit;
sqMetersPerUnit = AreaUnit.Hectares.SquareMetersPerUnit;
sqMetersPerUnit = AreaUnit.SquareKilometers.SquareMetersPerUnit;
sqMetersPerUnit = AreaUnit.SquareMiles.SquareMetersPerUnit;
sqMetersPerUnit = AreaUnit.SquareYards.SquareMetersPerUnit;