直接上代码了。 Demo1:加上价格标签 class Program { public decimal price { get; set; } static void Main(string[] args) { Program p = new Program(); p.price = 25; Console.WriteLine(p.ToString()); Console.ReadKey(); } public override string ToString() { return "$"+price.ToString(); } } Demo1:修改时间的输出格式 public DateTime time { get; set; } static void Main(string[] args) { Program p = new Program(); p.time = DateTime.Now; Console.WriteLine(p.ToString()); Console.ReadKey(); } public override string ToString() { return string.Format("{0}年{1}月{2}日",time.Year,time.Month,time.Day); }