System.Security.SecureString.AppendChar C# (CSharp) Method

		public void AppendChar (char c)
		{
			if (disposed)
				throw new ObjectDisposedException ("SecureString");
			if (read_only) {
				throw new InvalidOperationException (Locale.GetText (
					"SecureString is read-only."));
			}
			if (length == MaxSize)
				throw new ArgumentOutOfRangeException ("length", "> 65536");

			try {
				Decrypt ();
				int n = length * 2;
				Alloc (++length, true);
				data[n++] = (byte) (c >> 8);
				data[n++] = (byte) c;
			}
			finally {
				Encrypt ();
			}
		}

        /// <summary>
        /// Initializes a new instance of the MainViewModel class.
        /// </summary>
        /// <param name="windowService">
        /// The window service
        /// </param>
        /// <param name="addinService">
        /// The add-in service
        /// </param>
        /// <param name="settingsService">
        /// The settings service
        /// </param>
        public MainViewModel(IWindowService windowService, IAddinService addinService, ISettingsService settingsService)
        {
            this.windowService = windowService;

            var projects = settingsService.GetProjects();
            var projectModel = projects.FirstOrDefault();

            var tt = addinService.TaskTrackers.First();
            var qs = tt.GenerateQuerySettings();

            if (!projects.Any())
            {
                projectModel = new ProjectModel("Demo project", tt.Id);
                var ss = new SecureString();
                ss.AppendChar('H');
                ss.AppendChar('e');
                ss.AppendChar('l');
                ss.AppendChar('l');
                ss.AppendChar('o');

                var testSettings = new Dictionary<string, SecureString>
                {
                    { "SomeKey1", ss },
                    { "SomeKey2", ss }
                };

                var projectSettings1 = new SettingsModel(projectModel.InternalUrn, testSettings);
                settingsService.SaveProject(projectModel, projectSettings1);
            }

            var projectSettings2 = settingsService.GetProjectSettings(projectModel);
            this.Tasks = new ObservableCollection<ITaskModel>(tt.GetAssignedToUser(projectModel, projectSettings2));

            settingsService.SaveProject(projectModel);
        }