.net简单的记录日志

public static void LogFile(string fileName, string log)
        {
            FileStream file;
            if (!File.Exists(fileName))
            {
                file = File.Create(fileName);
            }
            else
            {
                file = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
            }
            System.Text.Encoding encode = System.Text.UTF8Encoding.UTF8;
            var bytes = encode.GetBytes(log);
            file.Position = file.Length;
            file.Write(bytes, 0, bytes.Length);
            file.Flush();
            file.Close();
        }