两种类型不相等，应该是 [英] Two Types not equal that should be

问题描述

我正在尝试调试一些使用反射加载插件的代码

I'm trying to debug some code that uses reflection to load plugins

调试代码如下:

Type a = methodInfo.GetParameters()[0]
    .ParameterType.BaseType;
Type b = typeof(MessageContext);
Debug.WriteLine(a.AssemblyQualifiedName);
Debug.WriteLine(b.AssemblyQualifiedName);
Debug.WriteLine(a.Equals(b));

这是它的输出:

OrtzIRC.Common.MessageContext, OrtzIRC.Common, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
OrtzIRC.Common.MessageContext, OrtzIRC.Common, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
错误

OrtzIRC.Common.MessageContext, OrtzIRC.Common, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
OrtzIRC.Common.MessageContext, OrtzIRC.Common, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
False

我不明白是什么让这两种类型不同?

I don't understand what would make these two types different?

推荐答案

由不同的应用程序域 [.NET] 或类加载器 [Java] 加载的相同类/类型不会比较相等，也不能相互分配直接.

The same class / type loaded by different app domains [.NET] or class loaders [Java] will not compare equal and are not assignable to/from each other directly.

您可能有两份包含该类型的 DLL - 一份由主程序加载，一份由 Assembly.Load*(...) 方法之一加载?

You likely have two copies of the DLL containing that type - one loaded by the main program and one loaded by one of the Assembly.Load*(...) methods?

尝试显示/比较属性:
a.Assembly.Equals(b.Assembly)
和
a.Assembly.Location.Equals(b.Assembly.Location)

通常，您只需要每个 DLL 的一个副本并将其加载到单个应用程序域中.

In general, you only want one copy of each DLL and have it loaded into a single app domain.

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