Can anyone help me to associate group in categories?

[inforzip]

I create the category, but how associate to all client groups

Bukimedia.PrestaSharp.Entities.category Category = new Bukimedia.PrestaSharp.Entities.category();
CategLang.id = 2;
CategLang.Value = prod.MasterCateg;
Category.active = 1;
Category.id_parent = 2;
Category.AddDescription(CategLang);
Category.AddName(CategLang);
Category.AddMetaDescription(CategLang);
Category.AddMetaKeywords(CategLang);
Category.AddMetaTitle(CategLang);
Category.AddLinkRewrite(CategLang);
CategoryFactory.Add(Category);