C# 如何使用反射访问内部类
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How to access internal class using Reflection
提问by dattebayo
How can I access an internal class of an assembly? Say I want to access System.ComponentModel.Design.DesignerHost. Here the DesignerHost is an internal and sealed class.
如何访问程序集的内部类？假设我想访问 System.ComponentModel.Design.DesignerHost。这里的 DesignerHost 是一个内部的密封类。
How can I write a code to load the assembly and the type?.
如何编写代码来加载程序集和类型？。
采纳答案by Jon Skeet
In general, you shouldn'tdo this - if a type has been marked internal, that means you're not meant to use it from outside the assembly. It could be removed, changed etc in a later version.
一般来说，你不应该这样做 - 如果一个类型被标记为内部，这意味着你不打算从程序集外部使用它。它可以在以后的版本中删除、更改等。
However, reflection doesallow you to access types and members which aren't public - just look for overloads which take a BindingFlagsargument, and include BindingFlags.NonPublicin the flags that you pass.
但是，反射确实允许您访问不公开的类型和成员 - 只需查找带有BindingFlags参数的重载，并将其包含BindingFlags.NonPublic在您传递的标志中。
If you have the fully qualifiedname of the type (including the assembly information) then just calling Type.GetType(string)should work. If you know the assembly in advance, and know of a public type within that assembly, then using typeof(TheOtherType).Assemblyto get the assembly reference is generally simpler, then you can call Assembly.GetType(string).
如果您具有类型的完全限定名称（包括程序集信息），则只需调用即可Type.GetType(string)。如果您事先知道程序集，并且知道该程序集中的公共类型，那么typeof(TheOtherType).Assembly用于获取程序集引用通常更简单，那么您可以调用Assembly.GetType(string).
回答by Patrick McDonald
To load the assembly and type you quoted in your example:
要加载程序集并键入您在示例中引用的内容：
Assembly design = Assembly.LoadFile(@"C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\System.Design.dll");
Type designHost = design.GetType("System.ComponentModel.Design.DesignerHost");
