谁能帮助我我对下面的这条消息有疑问

Question

namespace EmployeeService.Controllers
{
    public class EmployeeController : ApiController
    {
        public IEnumerable<Customer> Get()
        {
            using (Test_DBEntities test = new Test_DBEntities())
            {
                return test.Customers.tolist();
            }
        }
    }
}

Note: EmployeeDataAccess.Test_DBEntities : type used in a using statement must be implicitly convertible to System.IDisposable .

Answer 1

Your Test_DBEntities does not implement the System.IDisposable so you cannot put it in the using statement, remove it and the error will be gone.

namespace EmployeeService.Controllers {
   public class EmployeeController: ApiController {
       public IEnumerable Get() {
           Test_DBEntities test = new Test_DBEntities();
           return test.Customers.tolist();
       }
   }
}