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();
}