无法正确识别不同名称空间中的局部类 [英] Partial classes in different namespace are not being recognized correctly

问题描述

我有一个局部类，分为两个名称空间。问题是，如果我在部分之一上实现了接口，则在对应的部分类上无法识别该接口。例如，我希望下面的代码因被识别为 ILastModified 而返回true（C＃在 http://ideone.com/heLDn0 ）：

I have a partial class that is split over two namespaces. The problem is that if I have an interface implemented on one of the partials, it is not recognized on the counterpart partial class. For example, I would expect the below to return true for being recognized as ILastModified (C# fiddle at http://ideone.com/heLDn0):

using System;
using MyNamespace.One;
 
public class Test
{
    public static void Main()
    {
        var item = new Product();
        Console.WriteLine(item is ILastModified); //RETURNS FALSE??!
    }
}
 
interface ILastModified
{
    DateTime LastModified { get; set; }
}
 
namespace MyNamespace.One
{
    public partial class Product
    {
        public int ID { get; set; }
    }
}
 
namespace MyNamespace.Two
{
    public partial class Product : ILastModified
    {
        public DateTime LastModified { get; set; }
    }
}

推荐答案

您不能在两个不同的名称空间中使用局部类。编译器将它们视为两个不同的类。

You cannot have a partial class in two different namespaces. The compiler treats those as two different classes.

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