用C#编写统计文本行数的代码

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>

  <appSettings>
    <add key="FilePath" value="D:\SVN" />
    <add key="FileExtention" value="*.cs" />
  </appSettings>
</configuration>

using System;
using System.IO;



namespace ConsoleApp13
{
    class Program
    {
        static void Main(string[] args)
        {
            int fileCount = 0;
            int lines = 0;
            string folder = System.Configuration.ConfigurationManager.AppSettings["FilePath"] ;
            string extention = System.Configuration.ConfigurationManager.AppSettings["FileExtention"];

            foreach (var path in Directory.EnumerateFiles(folder, extention, SearchOption.AllDirectories))
            {
                fileCount++;
                using (var sr = new StreamReader(path))
                {
                    int line = 0;
                    var ls = "";
                    while ((ls = sr.ReadLine()) != null)
                    {
                        line++;
                    }
                    Console.WriteLine(Path.GetFileName(path) +":"+ line);
                    lines += line;
                }
            }
            Console.WriteLine("fileCount=" + fileCount);
            Console.WriteLine("lines=" + lines);
            Console.ReadLine();
        }

    }
}