C# difficulties are broken down one by one (3): params array parameters

using System; 

/****************************** 
* Chapter:C#难点逐个击破（三） 
* Author:王洪剑 
* Date:2010-1-16 
* Blog:http://www.51obj.cn/ 
* Email:walkingp@126.com 
* Description:数组参数params的使用 
* ***************************/ 
namespace TestParams 
{ 
class Program 
{ 
public static class ParamsClass 
{ 
/// <summary> 
/// 两个参数，最后一个参数为数组参数 
/// </summary> 
/// <param name="num"></param> 
/// <param name="args"></param> 
public static void ParamsMethod(int num,params string[] args) 
{ 
foreach (string _args in args) 
{ 
Console.WriteLine(_args); 
} 
Console.WriteLine("Total Num is " + num); 
Console.ReadKey(); 
} 
} 
static void Main(string[] args) 
{ 
string[] strArr ={"Wang Hongjian","ChenChen","Dodo" }; 
int personNum = strArr.Length; 
ParamsClass.ParamsMethod(personNum, strArr); 
} 
} 
}