Accessing nopCommerce for the first time after installation

Good day all,

when I access "http://localhost/nopCommerce", for the first time it automatically
takes me to "http://localhost/nopcommerce/install/install.aspx". What triggers this action, I would like to have the same feature in my web applications when they are accessed for the first time after installation. I can't find a sime redirect to this page(http://localhost/nopcommerce/install/install.aspx).

please help.
Best Wishes

Have a look in global.asax:

    void Application_BeginRequest(object sender, EventArgs e)
    {
        NopConfig.Init();
        if (!InstallerHelper.ConnectionStringIsSet())
        {
            InstallerHelper.RedirectToInstallationPage();
        }
    }

Thanx much really.
Best wishes