MakeGenericType -即

Type passInType = ... /// perhaps myAssembly.GetType(
        "ConsoleApplication2.Program+Person")
Type t = typeof(List<>).MakeGenericType(passInType);

举一个完整的例子：

using System;
using System.Collections.Generic;
using System.Reflection;
namespace ConsoleApplication2 {
 class Program {
   class Person {}
   static void Main(){
       Assembly myAssembly = typeof(Program).Assembly;
       Type passInType = myAssembly.GetType(
           "ConsoleApplication2.Program+Person");
       Type t = typeof(List<>).MakeGenericType(passInType);
   }
 }
}

如注释中所建议-解释， List<> 是 open 泛型类型-即 List< T> ，没有任何特定的 T （对于多个通用类型，您只需使用逗号-即 Dictionary&lt ;，> ）。当指定了 T （通过代码或通过 MakeGenericType ）时，我们将得到 closed 泛型类型-例如， List< int> 。

As suggested in the comments - to explain, List<> is the open generic type - i.e. "List<T> without any specific T" (for multiple generic types, you just use commas - i.e. Dictionary<,>). When a T is specified (either through code, or via MakeGenericType) we get the closed generic type - for example, List<int>.

使用 MakeGenericType ，仍然会强制执行任何泛型类型约束，而只是在运行时而不是在编译时。

When using MakeGenericType, any generic type constraints are still enforced, but simply at runtime rather than at compile time.