public void Follow(ISingle aSingle)
{
Console.WriteLine(String.Format("{0} bat dau follow {1}", Name, (aSingle as Single).Name));
aSingle.AtachFan(this);
}
public void Follow(ISingle aSingle)
{
Console.WriteLine(String.Format("{0} bat dau follow {1}", Name, (aSingle as Single).Name));
aSingle.AtachFan(this);
}