[DataContract]
    public class Vendor : BasicBussines.BussinesObject
    {        
        private string name;

        public Vendor() { }

        /// <summary>
        /// Конструктор
        /// </summary>
        /// <param name="name">имя производителя</param>
        public Vendor(string name)
        {
            this.Name = name;
        }

        /// <summary>
        /// Название производителя
        /// </summary>      
        [DataMember]
        public virtual string Name
        {
            get { return name; }
            set { name = value; }
        }
    }

    [ServiceBehavior]
    public class VendorManagerService : 
        BL.Base.ServiceManager<Vendor,OfficeCollections.VendorCollection>,IVendorManagerService
    {
        public static VendorManagerService CreateInstance()
        {
            return new VendorManagerService();
        }
    }

    [ServiceContract]
    public interface IVendorManagerService
    {
        [OperationContract]
        Vendor GetByID(int id);
        [OperationContract]
        void Save(Vendor vendor);
        [OperationContract]
        void Delete(Vendor vendor);
        [OperationContract]
        VendorCollection SelectAll();
    }

    public class ServiceManager<EntityT,CollectionT>
        where EntityT: class, 
        where CollectionT: class, ICollection<EntityT>
    {

        public CollectionT SelectAll()
        {

        }

        public EntityT GetByID(int id)
        {

        }

        public void Save(EntityT value)
        {

        }

        public void Delete(EntityT value)
        {            

        }
    }

    public class VendorService
    {
        private OfficeManagers.IVendorManagerService vendorService;

        public VendorService()
        {
            vendorService = OfficeManagers.VendorManagerService.CreateInstance();
        }

        public VendorCollection GetAllVendors()
        {
            return vendorService.SelectAll();
        }

        public Vendor GetVendor(int id)
        {
            return vendorService.GetByID(id);
        }

        public void AddOrUpdateVendor(Vendor vendor)
        {
            vendorService.Save(vendor);
        }

        public void DeleteVendor(Vendor vendor)
        {
            vendorService.Delete(vendor);
        }
    }