gistfile1.cs

public class MyClass<T>
{
    public class Nested { }
}

internal class Program
{
    private static void Main(string[] args)
    {
        Console.WriteLine(typeof(MyClass<>).GetNestedType("Nested")); // MyClass<>.Nested
        Console.WriteLine(typeof(MyClass<int>).GetNestedType("Nested")); // Still MyClass<>.Nested ???
        Console.ReadLine();
    }
}

测试代码如下：

var type1 = typeof(MyClass<int>).GetNestedType("Nested");
var type2 = typeof(MyClass<string>).GetNestedType("Nested");
var type3 = typeof(MyClass<>).GetNestedType("Nested");
Console.WriteLine("type1 is {0}", type1);
Console.WriteLine("type2 is {0}", type2);
Console.WriteLine("type3 is {0}", type3);

var n1 = new MyClass<int>.Nested();
var n2 = new MyClass<string>.Nested();

Console.WriteLine("n1.GetType() is {0}", n1.GetType());
Console.WriteLine("n2.GetType() is {0}", n2.GetType());

输出结果为：

type1 is TransitServerTest.MyClass`1+Nested[T]
type2 is TransitServerTest.MyClass`1+Nested[T]
type3 is TransitServerTest.MyClass`1+Nested[T]
n1.GetType() is TransitServerTest.MyClass`1+Nested[System.Int32]
n2.GetType() is TransitServerTest.MyClass`1+Nested[System.String]

貌似真的是 bug ， 求解释