为什么Type.IsGenericType对于没有从方法反射获得的返回类型但typeof(Task)的任务返回TRUE.IsGenericTyp返回FALSE

IsGenericType

指示当前类型是否表示泛型类型或方法定义中的类型参数。

bool bStraight = typeof(Task).IsGenericType;
bStraight.Dump("typeof(Task).IsGenericType");

按预期工作并产生输出:

typeof(任务).IsGenericType
假

public class MyClass
{
    public async Task Method()
    {
        await Task.Run(() =>
        {
            Thread.Sleep(3000);
        });
    }
}

public async Task TEST()
{
    MyClass theObject = new MyClass();

    Task task = (Task)typeof(MyClass).GetTypeInfo()
                            .GetDeclaredMethod("Method")
                            .Invoke(theObject, null);

    bool b = task.GetType().IsGenericType;  
    bool b2 = task.GetType().GetGenericTypeDefinition() == typeof(Task<>);
    b.Dump("IsGenericType");
    b2.Dump("GetGenericTypeDefinition");

    bool bStraight = typeof(Task).IsGenericType;
    bStraight.Dump("typeof(Task).IsGenericType");
}

我得到意外的输出:

IsGenericType类型

GetGenericTypeDefinition类型
是的