public static void Setup(int testItems) {
     SetTestRepo();
     for(int i=0;i<testItems;i++){
         CustomerCustomerDemo item=new CustomerCustomerDemo();
         _testRepo._items.Add(item);
     }
 }
 public static void Setup(CustomerCustomerDemo item) {
     SetTestRepo();
     _testRepo._items.Add(item);
 }