一个求分页的函数

编写环境：SnippetCompiler

不需要过多的解释，如有疑问请留言。

using System;
using System.Collections.Generic;

public class MyClass
{
    static int count=1234;
    static int pageSize=10;
    static int startIndex,endIndex;
    public static void RunSnippet()
    {
        GetDataArea(0);
        GetDataArea(1);
        GetDataArea(45);
        GetDataArea(123);
        GetDataArea(124);
        GetDataArea(1999);
    }

    private static void GetDataArea(int pageIndex)
    {
        GetDataArea(ref startIndex,ref endIndex,pageIndex,pageSize,count);
        Console.WriteLine("Page{2}\tArea is : \t{0} \t-- \t{1}",startIndex,endIndex,pageIndex);
    }

    private static void GetDataArea(ref int startIndex,ref int endIndex,int pageIndex,int pageSize,int count)
    {
        if(pageSize<=0||pageIndex<0||count<=0)
            throw new ArgumentException ("All paramater should bigger than zero!");

        try
        {
            startIndex=pageIndex*pageSize;
            endIndex=startIndex+pageSize-1;
        }
        catch
        {
            throw new ArgumentOutOfRangeException("May be the argument too bigger than Design!");
        }
        if(startIndex+1>count)
        {
            GetDataArea(ref startIndex,ref endIndex,pageIndex-1,pageSize,count);
            return;
        }
        if(count<endIndex+1)
            endIndex=count-1;
    }

    #region Helper methods

    public static void Main()
    {
        try
        {
            RunSnippet();
        }
        catch (Exception e)
        {
            string error = string.Format("---\nThe following error occurred while executing the snippet:\n{0}\n---", e.ToString());
            Console.WriteLine(error);
        }
        finally
        {
            Console.Write("Press any key to continue...");
            Console.ReadKey();
        }
    }

    private static void WL(object text, params object[] args)
    {
        Console.WriteLine(text.ToString(), args);
    }

    private static void RL()
    {
        Console.ReadLine();
    }

    private static void Break()
    {
        System.Diagnostics.Debugger.Break();
    }

    #endregion
}