C#

public CustomInstaller() : base()
{
    InitializeComponent();

    base.AfterUninstall += new InstallEventHandler(CustomInstaller_AfterUninstall);
}

public override void Uninstall(IDictionary savedState)
{
    base.Uninstall(savedState);
}

void CustomInstaller_AfterUninstall(object sender, InstallEventArgs e)
{
    // Ask to remove settings
    DialogResult result = MessageBox.Show("Do you want to remove all settings? (This is not reversible)", "Remove Settings",
        MessageBoxButtons.YesNo, MessageBoxIcon.Question);
    if (result == DialogResult.Yes)
    {
        try
        {
            Registry.LocalMachine.DeleteSubKeyTree(@"Software\JD Development");
        }
        catch (Exception ex)
        {
            MessageBox.Show("Unable to remove registry settings: " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

    // Delete the service
    Process.Start("sc", "delete JDAgent");
}