5-3字符逐位比较大小

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace _5_3
{
    class Program
    {
        static void Main(string[] args)
        {
            string strA, strB;
            int i;
            bool bA;
            i = 0;
            bA = true;

            Console.WriteLine("请输入字符串1：");
            strA = Console.ReadLine();
            Console.WriteLine("请输入字符串2：");
            strB = Console.ReadLine();

            Console.WriteLine("----------------------------------------");
            while (i < strA.Length && i < strB.Length)
            {

                if (strA[i] > strB[i])
                {
                    Console.WriteLine("字符串{0} 大于 字符串{1}", strA, strB);
                    Console.WriteLine("----------------------------------------");
                    Console.ReadKey();
                    return;

                }
                if (strA[i] < strB[i])
                {
                    Console.WriteLine("字符串{0} 小于 字符串{1}", strA, strB);
                    Console.WriteLine("----------------------------------------");
                    Console.ReadKey();
                    return;
                }

                i++;

            }

            if (i < strB.Length)
            {
                Console.WriteLine("字符串{0} 小于 字符串{1}", strA, strB);
                Console.WriteLine("----------------------------------------");
                Console.ReadKey();
                return;
            }
            if (i < strA.Length)
            {
                Console.WriteLine("字符串{0} 大于 字符串{1}", strA, strB);
                Console.WriteLine("----------------------------------------");
                Console.ReadKey();
                return;
            }

            Console.WriteLine("字符串{0} 等于 字符串{1}", strA, strB);


            Console.WriteLine("----------------------------------------");
            Console.ReadKey();
        }
    }
}