SPListDataSource ds = new SPListDataSource();
ds.SetProperty(SPListDataSource.BDCProperties.LobSystemInstance, "Demo Customers");
ds.SetProperty(SPListDataSource.BDCProperties.EntityNamespace, "http://intranet");
ds.SetProperty(SPListDataSource.BDCProperties.Entity, "Demo Customers");
ds.SetProperty(SPListDataSource.BDCProperties.SpecificFinder, "CustomerRead Item");
using (SPSite site = new SPSite("http://intranet"))
{
    using (SPWeb web = site.RootWeb)
    {
        web.Lists.Add("Demo Customers", "Demo Customers", "Lists/DemoCustomers", ds);
    }
}