How to get list of SPGroups in SharePoint Site Collection

Sharepoint Gropus (or SPGroups) are never created in the context of the site-they are always created in the context of the site collection and assigned to a site.

We can get list of groups of a site by suing site.Groups


SPSite siteCollection = new SPSite("http://localhost/litware/sales/");
SPWeb site = siteCollection.OpenWeb();

foreach(SPGroup group in site.Groups){
Console.WriteLine(group.Name);
}