public void Contains(commodity m) { if (myshop.Contains(m)) { Console.WriteLine("存在列表中"); } else { m.ToSting(); } }
public bool Contains(string m) { commodity stu = new commodity(); if (stu.Name.Contains(m)) { //Console.WriteLine("存在列表中"); return(true); } else { stu.ToSting(); return(false); } }