reproduces wglDXOpenDeviceNV ERROR_OPEN_FAILED inside Sandbox with NVidia GPU

GLDX-Sandbox.cs

using System.ComponentModel;
using System.Runtime.InteropServices;

using SharpDX.Direct3D11;

using Silk.NET.Core.Contexts;
using Silk.NET.GLFW;
using Silk.NET.OpenGL;
using Silk.NET.WGL;
using Silk.NET.WGL.Extensions.NV;
using Silk.NET.Windowing;

var window = Window.Create(WindowOptions.Default with {
    Title = "Silk.NET DXInterop Test",
    Size = new(1280, 720)
});

window.Load += () => {
    var gl = GL.GetApi(window);
    var wgl = new WGL(gl.Context);

    unsafe {
        var glfw = Glfw.GetApi();
        var context = new LamdaNativeContext(glfw.GetProcAddress);
        var dxInterop = new NVDXInterop(context);
        int? index = args.Length > 0 ? int.Parse(args[0]) : null;
        Console.WriteLine($"{gl.GetStringS(StringName.Renderer)}\n#{index}\n");

        using var factory = new SharpDX.DXGI.Factory1();
        Device device;
        var adapters = factory.Adapters;
        if (index is { } i) adapters = new[] { adapters[i] };
        Console.WriteLine($"Adapters: #{index} of {adapters.Length}");
        foreach (var adapter in adapters) {
            Console.WriteLine($"{adapter.Description.Description}");
            device = new(adapter, DeviceCreationFlags.BgraSupport);
            Marshal.SetLastSystemError(0);
            Marshal.SetLastPInvokeError(0);
            nint handle = dxInterop.DxopenDevice((void*)device.NativePointer);
            if (handle == 0) {
                int error = Marshal.GetLastSystemError();
                if (error == 0) error = Marshal.GetLastPInvokeError();
                device.Dispose();
                Console.Error.WriteLine($"{error}: {new Win32Exception(error).Message}");
            } else {
                Console.WriteLine($"OK: {handle}");
                break;
            }

            Console.WriteLine();
        }

        window.Close();
    }
};

window.Run();

window.Dispose();

GLDX-Sandbox.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net6.0-windows10.0.19041.0</TargetFramework>
    <RootNamespace>GLDX_Sandbox</RootNamespace>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="SharpDX.Direct3D11" Version="4.2.0" />
    <PackageReference Include="Silk.NET.OpenGL" Version="2.17.1" />
    <PackageReference Include="Silk.NET.WGL.Extensions.NV" Version="2.17.1" />
    <PackageReference Include="Silk.NET.Windowing.Glfw" Version="2.17.1" />
  </ItemGroup>

</Project>

Prints:

NVIDIA GeForce RTX 3090
-1073282962: Unknown error (0xc007006e)