Razor runtime compilation with dynamic assemblies fails

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

When I load an assembly and then try to use any of its types as a view model I get an error that the provided instance does not match the expected type:

As you can see the weird part is that the expected and actual types are the same.

Below are the view, controller and model definitions:

using Microsoft.AspNetCore.Mvc;

namespace DemoNamespace
{
    public class TestController : Controller
    {
        public IActionResult Index()
        {

            return View(new TestViewModel{Name = "Test"});
        }
    }
}

namespace DemoNamespace
{
    public class TestViewModel
    {
        public string Name { get; set; }
    }
}

@using DemoNamespace

@model TestViewModel

<h1>@Model.Name</h1>

I made sure that the assembly is loaded only once and also tested to create an instance of the model within the view manually which worked, so the assembly must be loaded correctly. Also, changing the model directive to dynamic worked as well.

Expected Behavior

To work without any errors.

Steps To Reproduce

Load an assembly runtime and use any of its types as a view model.

Exceptions (if any)

No response

.NET Version

No response

Anything else?

No response

[aloksharma1]

@gyankov i have the same issue as you from version 3.1 till now, its not fixed.

[javiercn]

@gyankov thanks for contacting us.

@pranavkm do you have any thoughts here? Is this supported at all?