C# 生成隨機字符串, 隨機數, 字母+數字

using System;

namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(GetNonceStr(5));
            Console.Read();
        }

        /// <summary>
        /// 生成隨機字符串
        /// </summary>
        /// <param name="length">字符串長度</param>
        /// <returns></returns>
        static string GetNonceStr(int length)
        {
            char[] chars = {
                                '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
                                'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
                                'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
                                'u', 'v', 'w', 'x', 'y', 'z',
                                'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
                                'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
                                'U', 'V', 'W', 'X', 'Y', 'Z'
                               };
            string result = "";
            Random rnd = new Random(Guid.NewGuid().GetHashCode());
            for (int i = 0; i < length; i++)
            {
                result += chars[rnd.Next(chars.Length)];
            }
            return result;
        }
    }
}