C#计算代码行数

class Program
{
static void Main(string[] args)
{
int totalLineCount = 0;
string directory;

if(args.Length>0)
{
directory = args[0];
}
else
{
directory = Directory.GetCurrentDirectory();
}

directory = @"F:\workdocs";
Console.WriteLine(directory);
totalLineCount = DirectoryCountLines(directory);
System.Console.WriteLine(totalLineCount);
Console.ReadLine();
}

static int DirectoryCountLines(string directory)
{
int lineCount = 0;
foreach(string file in Directory.GetFiles(directory,"*.cs"))
{
lineCount += CountLines(file);
}

foreach(string subdirectory in Directory.GetDirectories(directory))
{
lineCount += DirectoryCountLines(subdirectory);
}
return lineCount;
}

private static int CountLines(string file)
{
string line;
int lineCount = 0;

FileStream stream = new FileStream(file,FileMode.Open);
StreamReader reader = new StreamReader(stream);

line = reader.ReadLine();
while(line!=null)
{
if(line.Trim()!="")
{
lineCount++;
}

line = reader.ReadLine();
}
reader.Close();
return lineCount;
}
}