Discover Click Once Applications Currently Installed

To discover “Click Once” applications currently installed in a machine, below code helps to find out currently installed click once applications.
The GetInstalledClickOnceApps() method read the installed click once applications from Registry;add it to the list and return the list.
The LoadInstalledClickOnceApps() method binds installed application names and version to the list view.
The Load() method is the root method.


Code:
public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Load();
        }


        ///
        /// Load
        ///

        private void Load()
        {
            try
            {
                LoadInstalledClickOnceApps();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Not able to load the installed click once applications!");
            }
        }


        ///
        /// Bind installed application names to the VIEW
        ///

        private void LoadInstalledClickOnceApps()
        {
            IDictionary iClickOnceApps = GetInstalledClickOnceApps();
            foreach (KeyValuePair keyValuePair in iClickOnceApps)
            {
                listAppView.Items.Add(new ListViewItem(new[] { keyValuePair.Value, keyValuePair.Key }));
            }
        }

        ///
        /// Read the installed click once applications from Registry;add it to the list and return the list
        ///
        ///
        private IDictionary GetInstalledClickOnceApps()
        {
            IDictionary installedApps = new Dictionary();
            RegistryKey registryKeys = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall");
            string[] appKeyNames = registryKeys.GetSubKeyNames();
            string displayName = null;
            string displayVersion = null;
            foreach (string appKeyName in appKeyNames)
            {
                RegistryKey appKey = registryKeys.OpenSubKey(appKeyName);
                displayName = (string)appKey.GetValue("DisplayName");
                displayVersion = (string)appKey.GetValue("DisplayVersion");
                installedApps.Add(displayVersion, displayName);
                appKey.Close();
            }
            registryKeys.Close();
            return installedApps;
        }
    }