Canvas.CommandLineParsing.MainParser.ShowHelp C# (CSharp) Метод

        private void ShowHelp(TextWriter writer, ModeParser specifiedMode = null)
        {
            writer.WriteLine($"Canvas {GetVersion()} {GetCopyright()}");
            writer.WriteLine();
            string modeName = specifiedMode?.Name ?? "[MODE]";
            if (specifiedMode != null)
            {
                writer.WriteLine($"{specifiedMode.Name} - {specifiedMode.Description}");
                writer.WriteLine();
            }
            writer.WriteLine($"Usage: Canvas.exe {modeName} [OPTIONS]+");
            writer.WriteLine();
            if (specifiedMode == null)
            {
                writer.WriteLine("Available modes:");
                foreach (var mode in _modeParsers.Values)
                {
                    writer.WriteLine($"\t{mode.Name} - {mode.Description}");
                }
                writer.WriteLine();
            }
            writer.WriteLine("Options:");
            if (specifiedMode != null)
            {
                specifiedMode.ShowHelp(writer);
            }
            BaseOptionsParser.ShowHelp(writer);
        }

 private void ShowError(MainParser main, WriteLine errorWriter, string errorMessage)
 {
     errorWriter(errorMessage);
     errorWriter(" ");
     main.ShowHelp(errorWriter, this);
 }