gistfile1.cs

        [Fact]
        public void RemoveBom()
        {
            foreach (var file in new DirectoryInfo("..\\..").EnumerateFiles("*", SearchOption.AllDirectories))
            {
                try
                {
                    var allBytes = File.ReadAllBytes(file.FullName);
                    var allText = File.ReadAllText(file.FullName);
                    if (allBytes.Length - allText.Length == 3 &&
                        allBytes[0] == 0xef &&
                        allBytes[1] == 0xbb &&
                        allBytes[2] == 0xbf)
                    {
                        Console.WriteLine("{0} {1}", file.FullName, file.Length);
                        File.WriteAllText(file.FullName, allText, Encoding.Default);
                    }
                }
                catch
                {

                }
            }
        }