Install() - All features and components are installed.
Install(List<MsiFeature> listOfFeatures) - Only the list of features which are supplied as argument are installed.

Remove() - All features and components are uninstalled.
Remove(List<MsiFeature> listOfFeatures) - Only the list of features which are supplied as argument are uninstalled.

Repair() - MsiInstaller class detects list of features already installed on local system and re-installs them.

Update(List<MsiFeature> installList, List<MsiFeature> uninstallList,)
    Install List - Feature is reinstalled if it is already installed or that feature is freshly installed.
    Uninstall List - Feature which are already installed are removed or other features are ignored.

.Net application needs to subscribe InstallerMessageReceived event to handle Windows Installer messages. Know more  Download sample