Mycroft.Logger.CheckFile C# (CSharp) Method

        private void CheckFile()
        {
            if (!DateTime.Today.Equals(this.date))
            {
                if (os != null)
                {
                    Close();
                }
                this.date = DateTime.Today;

                Directory.CreateDirectory(path);
                this.filename = System.IO.Path.Combine(path, DateTime.Now.ToString("yyyy-MM-dd") + ".log");

                lock (WriteLock)
                {
                    fs = new FileStream(filename, FileMode.Append);
                    os = new StreamWriter(fs);
                    os.AutoFlush = true;
                }
            }
        }