FindType.DirAdd C# (CSharp) Method

  public void DirAdd(string dir)
  {
    DirList.Add(dir);      
  }

    // Processes all of the options specified in the arguments
    private static void SetOptions(string[] args, FindType ft)
    {
        if (args.Length == 0)
        {
            PrintUsage();
            return;
        }

        ft.VerbosePrint = false;

        char[] backslash = new char[1];
        backslash[0] = '\\';

        for (int i = 0; i < args.Length; i++)
        {
            string curArg = args[i];

            if (curArg[0] == '-' || curArg[0] == '/')
            {
                if (Char.ToUpper(curArg[1]) == 'D')
                {
                    if (curArg.Length > 2 && curArg[2] == ':')
                    {
                        String dir = curArg.Substring(3).TrimEnd(backslash).ToUpper();

                        if (dir != "")
                        {
                            ft.DirAdd(dir);
                        }
                        else
                        {
                            Console.WriteLine("Directory not specified");
                        }
                    }
                    else
                    {
                        Console.WriteLine("Directory not specified");
                    }
                }
                else
                {
                    for (int j = 1; j < curArg.Length; j++)
                    {
                        switch (Char.ToUpper(curArg[j]))
                        {
                        case 'X':
                            ft.ExactMatchOnly = true;
                            break;

                        case 'R':
                            ft.RecurseTypes = true;
                            break;

                        case 'V':
                            ft.VerbosePrint = true;
                            break;

                        case 'N':
                            ft.MatchOnlyNamespace = true;
                            break;

                        case 'W':
                            ft.WideSearch = true;
                            break;

                        case 'I':
                            ft.ShowInterfaces = true;
                            break;

                        case 'M':
                            ft.ShowMethods = true;
                            break;

                        case 'F':
                            ft.ShowFields = true;
                            break;

                        case 'P':
                            ft.ShowProperties = true;
                            break;

                        case 'E':
                            ft.ShowEvents = true;
                            break;

                        case 'L':
                            ft.ShowModuleInfo = true;
                            break;

                        case 'A':
                            ft.ShowAll();
                            break;

                        case '?':
                            PrintUsage();
                            break;

                        case 'D':
                            Console.WriteLine("Directory not specified");
                            break;

                        default:
                            Console.WriteLine("Invald Option[{0}]", curArg[j]);
                            break;
                        }
                    }
                }
            }
            else
            {
                ft.ClassAdd(curArg);
            }
        }
    }