NServiceBus.XmlSanitizingStream.ReadLine C# (CSharp) Method

        public override string ReadLine()
        {
            var builder = new StringBuilder();
            while (true)
            {
                var number = Read();
                switch (number)
                {
                    case -1:
                        if (builder.Length > 0)
                        {
                            return builder.ToString();
                        }
                        return null;

                    case 13:
                    case 10:
                        if ((number == 13) && (Peek() == 10))
                        {
                            Read();
                        }
                        return builder.ToString();
                }
                builder.Append((char) number);
            }
        }