String类的Length属性返回字符串中的字符数。

C#获取字符串中的字符数示例

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ConsoleApplication4

{

  class Program

  {

      static void Main(string[] args)

      {

          string authorName = "Onitroad.com Beniwal";

          Console.WriteLine("Number of characters: " + authorName.Length);

          Console.ReadLine(); 

      }

  }

}