Code：
1 ///<summary>
2 /// ToStringFormat
3 /// 创建人：Carl.Yang
4 /// 创建日期：2011-11-11
5 ///</summary>
6 ///<param name="args"></param>
7 static void Main(string[] args)
8 {
9 decimal price1 = 99.6547M;
10 decimal price2 = 99.6544M;
11
12 //要截取的长度
13 int length = 3;
14 //F03
15 string format = string.Format("F0{0}", length);
16
17 Console.WriteLine(price1.ToString(format));
18 Console.WriteLine(price2.ToString(format));
19 Console.ReadLine();
20 }
输出结果：
//99.655
//99.654