使用通用接口属性覆盖非泛型接口属性(Overriding a non-generic interface property with a generic one)

 我有两个接口，如下所示： 
 
public interface IEntityViewModel<T> : IEntityViewModel where T : class, ICLEntity
{
    new T Entity { get; set; }
}

public interface IEntityViewModel
{        
    void LoadEntity(int primaryKey);
    bool? DialogResult { get; set; }
    ICLEntity Entity { get; set; }        
}
 
 当我实现一个类时，如何确保该类上出现的Entity属性是通用T？ 这是一个示例类： 
 
    public abstract class EntityConductor<T> : IEntityViewModel<T>
    where T : class, ICLEntity
    {
        public T Entity
        {
            get; set;
        }
    }
 
 编译器要求我也添加IEntityViewModel实现，例如： 
 
ICLEntity IEntityViewModel.Entity
    {
        get
        {
            return ActiveItem.Entity;
        }
        set
        {
            ActiveItem.Entity = value as T;
        }
    }
 
 但后来我在课堂上得到了两个Entity属性，这不是我需要的。 如果实现泛型接口，我需要将Entity属性设置为T类型，如果是非泛型，则需要为ICLEntity类型。 
 
 如何才能做到这一点？ 我错过了一些简单的事吗？ 我使用的是.NET 4.0，协方差可以帮助我吗？ 
 
 谢谢！ 

I have two interfaces like the following:
 
public interface IEntityViewModel<T> : IEntityViewModel where T : class, ICLEntity
{
    new T Entity { get; set; }
}

public interface IEntityViewModel
{        
    void LoadEntity(int primaryKey);
    bool? DialogResult { get; set; }
    ICLEntity Entity { get; set; }        
}
 
When I implement a class, how can I ensure that the Entity property that appears on the class is the generic T? Here's a sample class:
 
    public abstract class EntityConductor<T> : IEntityViewModel<T>
    where T : class, ICLEntity
    {
        public T Entity
        {
            get; set;
        }
    }
 
The compiler requires I add the IEntityViewModel implementation as well, for example:
 
ICLEntity IEntityViewModel.Entity
    {
        get
        {
            return ActiveItem.Entity;
        }
        set
        {
            ActiveItem.Entity = value as T;
        }
    }
 
but then I get two Entity properties in the class, which is not what I need. If implementing the generic interface, I need the Entity property to be of type T, and if the non generic, to be of type ICLEntity.
 
How can this be done? Am I missing something simple? I am using .NET 4.0, can covariance help me here?
 
Thanks!

原文：https://stackoverflow.com/questions/6604503