System.Net.FtpControlStream.FormatFtpCommand C# (CSharp) Method

        private string FormatFtpCommand(string command, string parameter)
        {
            StringBuilder stringBuilder = new StringBuilder(command.Length + ((parameter != null) ? parameter.Length : 0) + 3 /*size of ' ' \r\n*/);
            stringBuilder.Append(command);
            if (!string.IsNullOrEmpty(parameter))
            {
                stringBuilder.Append(' ');
                stringBuilder.Append(parameter);
            }
            stringBuilder.Append("\r\n");
            return stringBuilder.ToString();
        }