Normalize line endings using C#

gistfile1.cs

var dir = @"C:\Projects\EntityFramework";
var buffer2 = new char[1];
var buffer1 = new byte[3];
var bom = new byte[] { 0xEF, 0xBB, 0xBF };

foreach (var file in Directory.EnumerateFiles(dir, "*", SearchOption.AllDirectories))
{
    if (file.Contains(@".git\")
        || file.Contains(@".vs\"))
        continue;

    Encoding encoding;

    using (var stream = new FileStream(file, FileMode.Open, FileAccess.Read))
    using (var reader = new StreamReader(stream))
    {
        reader.Read(buffer2, 0, 1);

        encoding = reader.CurrentEncoding;

        if (encoding == Encoding.UTF8)
        {
            stream.Seek(0, SeekOrigin.Begin);
            stream.Read(buffer1, 0, 3);

            var withSignature = buffer1.SequenceEqual(bom);

            encoding = new UTF8Encoding(withSignature);
        }
    }

    var contents = File.ReadAllText(file, encoding);
    File.WriteAllText(
        file,
        contents.Replace("\r\n", "\n").Replace("\n", "\r\n"),
        encoding);