与通用接口混淆

Question

如有任何帮助，我们将不胜感激。我正在观看关于复数视觉的视频，但我无法弄清楚我做错了什么。我收到这个错误

Error 5 The type 'Domain.Business.Entities.Employee' cannot be used as type parameter 'T' in the generic type or method 'Core.Common.DataRepositoryBase'. There is no implicit reference conversion from 'Domain.Business.Entities.Employee' to 'Core.Common.Contracts.IIdentifiableEntity'. C:\Users\ibraheem\Documents\Visual Studio 2013\Practice\EF_MVC_Practice\Employees.Data\Repositories\EmployeeRepository.cs 11 18 Employees.Data

这就是我的代码的样子

public interface IDataRepository
{

}

public interface IDataRepository<T> : IDataRepository where T : class, IIdentifiableEntity, new()
{ 
  //do stuff
}


public abstract class DataRepositoryBase<T, U> : IDataRepository<T> 
    where T : class, IIdentifiableEntity, new()
     where U : DbContext, new()
{

}

//this is where I get the error
public class EmployeeRepository : DataRepositoryBase<Employee, EmployeesContext>
{
}

编辑：

    public class Employee : IIdentifiableEntity
{}

已解决： EmployeeRepository 从未实现 IIdentifiableEntity

感谢大家的帮助。

Answer 1

已解决：EmployeeRepository 从未实现 IIdentifiableEntity

感谢大家的帮助。

与通用接口混淆

Confused with Generic Interfaces

c#

covariance