public Musiclabel(string n, string ad, string ec, Singer sm)
{
this.name = n;
this.addass = ad;
this.executive = ec;
this.singerMusic = sm;
}
static void Main(string[] args)
{
Singer s1 = new Singer("Yerim", "Yeri", "21", "1999 March 5");
Singer s2 = new Singer("Suyong", "Joy", "23", "1996 September 3");
Singer s3 = new Singer("Sungwan", "Wendy", "21", "1994 February 21 ");
Musiclabel m1 = new Musiclabel("SM", "Korea", "LeeSooMan", s2);
Console.WriteLine(m1);
}