static int Main(string[] args)
{
int year;
if (args.Length != 1 || !int.TryParse(args[0], out year) || year <Astronomy.MinYear || year> Astronomy.MaxYear)
{
Console.WriteLine("ERROR: Must provide year {0}..{1} on command line.", Astronomy.MinYear, Astronomy.MaxYear);
return(1);
}
SeasonsInfo seasons = Astronomy.Seasons(year);
Console.WriteLine("March equinox : {0}", seasons.mar_equinox);
Console.WriteLine("June solstice : {0}", seasons.jun_solstice);
Console.WriteLine("September equinox : {0}", seasons.sep_equinox);
Console.WriteLine("December solstice : {0}", seasons.dec_solstice);
return(0);
}