public BrandBuilder Sony()
 {
     var sony = new Brand
     {
         Id = new Guid("80DB78BB-6592-49A6-9FDC-E1640E500598"),
         Name = "Sony"
     };
     _brands.Add(sony);
     return this;
 }
 public BrandBuilder Palm()
 {
     var palm = new Brand
     {
         Id = new Guid("F9C04E5A-CF6C-40F7-B7A2-3F910E4400C3"),
         Name = "Palm"
     };
     _brands.Add(palm);
     return this;
 }
 public BrandBuilder Htc()
 {
     var htc = new Brand
     {
         Id = new Guid("30FCB51C-4F50-486D-A4C3-82F8288098DF"),
         Name = "HTC"
     };
     _brands.Add(htc);
     return this;
 }
 public BrandBuilder Hp()
 {
     var hp = new Brand
     {
         Id = new Guid("567BB0B2-86D8-4DAD-BAA3-711312F095C0"),
         Name = "Hewlett-Packard"
     };
     _brands.Add(hp);
     return this;
 }
 public BrandBuilder Canon()
 {
     var canon = new Brand
     {
         Id = new Guid("88831A75-F10D-43C3-8105-107D9D9DB880"),
         Name = "Canon"
     };
     _brands.Add(canon);
     return this;
 }
 public BrandBuilder Apple()
 {
     var apple = new Brand
     {
         Id = new Guid("8CA27305-8C3D-418B-A9AE-68DF3DBFC0A8"),
         Name = "Apple"
     };
     _brands.Add(apple);
     return this;
 }