使用C#批量转换文本文件编码为UTF8

现在很多地方都要求程序源码用UTF8格式，因此需要将原来的源码转换一下，手动转显然太累了。

发现c#还真是简单啊，几行代码就搞定了。 试了一下GBK转换成UTF8编码格式，没什么问题了。

       static void Main(string[] args)
        {
            string dir, filters;
            Console.WriteLine("Please input the directory:");
            dir = Console.ReadLine();
            Console.WriteLine("Please input the filter(such as *.c,*.cpp):");
            filters = Console.ReadLine();
            Console.WriteLine("The following files will be converted:");
            List<string> destfiles = new List<string>();
            foreach (string filter in filters.Split(','))
            {
                foreach (var eachfileinfo in new DirectoryInfo(dir).GetFiles(filter, SearchOption.AllDirectories))
                {
                    destfiles.Add(eachfileinfo.FullName);
                    Console.WriteLine(eachfileinfo.FullName);
                }
            }
            Console.WriteLine("You Sure? (y or n)");
            string ans = Console.ReadLine();
            if (ans.Equals("y", StringComparison.OrdinalIgnoreCase))
            {
                foreach (string destfile in destfiles)
                {
                    File.WriteAllText(destfile, File.ReadAllText(destfile,Encoding.Default), Encoding.UTF8);
                }
                Console.WriteLine("finished.");
            }
            else
            {
                Console.WriteLine("Nothing changed.");
            }
            Console.WriteLine("Press any key to exit.");
            Console.ReadLine();
        }