C#向文件写、读数据

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;

namespace FileTest
{
    class Program
    {
        static void Main(string[] args)
        {
            WriteFile();
            ReadFile();

            Console.ReadKey();
        }

        /// <summary>
        /// 写、读文件
        /// </summary>
        static void WriteFile()
        {
            string pathUrl = @"E:\我的任务\其他\MyCodes_VS2013\MyCodes\TestFolder\WriteAndReadFile.txt";

            try
            {
                if (File.Exists(pathUrl))
                {
                    #region 向文件写入数据

                    Console.WriteLine("");
                    //以WriteAllBytes方式向文件中写入数据，可以操作除文本文件外的文件类型，比如音频文件，视频文件等
                    Console.WriteLine("以WriteAllBytes方式向文件中写入数据");
                    byte[] contentInByte = Encoding.GetEncoding("gb2312").GetBytes("以WriteAllBytes方式向文件中写入数据。"); ;
                    File.WriteAllBytes(pathUrl, contentInByte);

                    Console.WriteLine("");
                    //以WriteAllLines方式向文件中写入数据
                    Console.WriteLine("以WriteAllLine方式向文件中写入数据");
                    string[] contentInString = new string[] { "以WriteAllLine方式向文件中写入数据。" };
                    File.WriteAllLines(pathUrl, contentInString, Encoding.GetEncoding("gb2312"));

                    Console.WriteLine("");
                    //以WriteAllText方式向文件中写入数据
                    Console.WriteLine("以WriteAllText方式向文件中写入数据");
                    File.WriteAllText(pathUrl, "以WriteAllText方式向文件中写入数据。", Encoding.GetEncoding("gb2312"));
                    #endregion

                    #region  以上三种方会将文件原有数据覆盖，若想不覆盖原有数据，可以用下面两种方法；实现在原有数据后追加数据
                    //AppendAllLines方式向文件写入数据
                    File.AppendAllLines(pathUrl, new string[] { "AppendAllLine方式向文件写入数据" }, Encoding.GetEncoding("gb2312"));
                    //AppendAllText方式向文件写入数据
                    File.AppendAllText(pathUrl, "AppendAllText方式向文件写入数据", Encoding.GetEncoding("gb2312"));
                    #endregion

}

else
                {
                    File.Create(pathUrl);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message + ex.StackTrace);
            }

        }

        static void ReadFile()
        {
            string pathUrl = @"E:\我的任务\其他\MyCodes_VS2013\MyCodes\TestFolder\WriteAndReadFile.txt";

            try
            {
                if (File.Exists(pathUrl))
                {
                    Console.WriteLine("");
                    #region 读取文件数据

                    //以ReadAllBytes方式读取数据
                    Console.WriteLine("以ReadAllBytes方式读取文件数据：");
                    byte[] readContentInByte = File.ReadAllBytes(pathUrl);
                    Console.WriteLine(Encoding.GetEncoding("gb2312").GetString(readContentInByte));

                    Console.WriteLine("");
                    //以ReadAllLine方式读取数据
                    Console.WriteLine("以ReadAllLine方式读取文件数据：");
                    string[] readContentInString = File.ReadAllLines(pathUrl, Encoding.GetEncoding("gbk"));
                    Console.WriteLine(readContentInString.Aggregate(string.Empty, (result, current) => result += current));

                    Console.WriteLine("");
                    //以ReadAllText方式读取数据
                    Console.WriteLine("以ReadAllTex方式读取文件数据：");
                    Console.WriteLine(File.ReadAllText(pathUrl, Encoding.GetEncoding("GBK")));

                    #endregion
                }
                else
                {
                    File.Create(pathUrl);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message + ex.StackTrace);
            }

        }
    }
}