Problems encountered when using D3D11

[MakesYT]

I tried this with the following code, but I ended up with a Span that only had 0 in it, anyone know why?

            DXGI dxgi = new DXGI(new DefaultNativeContext("dxgi"));
            dxgi.CreateDXGIFactory1<IDXGIFactory1>(out var factory);
            IDXGIAdapter1* adapter1 = null;
            factory.EnumAdapters1(0, ref adapter1);
            uint i = 0;
           
            IDXGIOutput* output = null;
            var i1 = adapter1->EnumOutputs(i, ref output);
            OutputDesc desc=new OutputDesc(null);
            output->GetDesc(ref desc);
            var ptrToStringAuto = Marshal.PtrToStringAuto((IntPtr)desc.DeviceName);
            Console.WriteLine(ptrToStringAuto);
            
            output->QueryInterface<IDXGIOutput5>(out var output5);
            
            
            ID3D11Device* device=null;
            ID3D11DeviceContext* context=null;
            D3DFeatureLevel featureLevel=D3DFeatureLevel.Level101;
            D3D11 d3D11 = new D3D11(new DefaultNativeContext("d3d11"));
            d3D11.CreateDevice((IDXGIAdapter*)adapter1, D3DDriverType.Unknown, IntPtr.Zero,
                (uint)CreateDeviceFlag.None,D3DFeatureLevel.Level111,1, D3D11.SdkVersion, ref device,
                ref featureLevel, ref context);
            
            Texture2DDesc captureTextureDesc = new()
            {
                CPUAccessFlags = (uint)CpuAccessFlag.Read,
                BindFlags = (uint)(BindFlag.None),
                Format = Format.FormatB8G8R8A8Unorm,
                Width = (uint)desc.DesktopCoordinates.Size.X,
                Height = (uint)desc.DesktopCoordinates.Size.Y,
                MiscFlags = (uint)ResourceMiscFlag.None,
                MipLevels = 1,
                ArraySize = 1,
                SampleDesc = { Count = 1, Quality = 0 },
                Usage = Usage.Staging
            };
            SubresourceData* data = null;
            ID3D11Texture2D* captureTexture = null;
            device->CreateTexture2D(&captureTextureDesc,data,ref captureTexture );
            IDXGIOutputDuplication *outputDuplication = null;
            output5.DuplicateOutput((IUnknown*)device,ref outputDuplication);
            OutduplFrameInfo outduplFrameInfo = new OutduplFrameInfo();
            IDXGIResource* desktopResource = null;
            outputDuplication->AcquireNextFrame(1000, &outduplFrameInfo, &desktopResource);
            desktopResource->QueryInterface<ID3D11Texture2D>(out var desktopTexture);
            var desktopTexture1= desktopTexture.Get();
            ID3D11DeviceContext* immediateContext = null;
            device->GetImmediateContext(ref immediateContext);
            Box box = new Box
            {
                Left = 0,
                Top = 0,
                Front = 0,
                Right = (uint)desc.DesktopCoordinates.Size.X,
                Bottom = (uint)desc.DesktopCoordinates.Size.Y,
                Back = 1
            };
            
            
            immediateContext->CopySubresourceRegion((ID3D11Resource*)captureTexture,0,0,0,0,(ID3D11Resource*)&desktopTexture1,0,box);
            MappedSubresource mappedSubresource=new MappedSubresource();
            immediateContext->Map((ID3D11Resource*)captureTexture, 0, Map.Read, 0, &mappedSubresource);
            var span = new ReadOnlySpan<byte>(mappedSubresource.PData,
                (int)mappedSubresource.DepthPitch);
            var image=Image.Load<Bgra32>(span);
            image.SaveAsJpeg("1.jpg");

[MakesYT]

I changed the code to the following, and still only got 0

DXGI dxgi = new DXGI(new DefaultNativeContext("dxgi"));
        if (dxgi.CreateDXGIFactory1<IDXGIFactory1>(out var factory)!=0)
        {
            throw new Exception("Failed to create DXGI factory");
        }
        IDXGIAdapter1* adapter1 = null;
        if (factory.EnumAdapters1(0, ref adapter1)!=0)
        {
            throw new Exception("Failed to create DXGI adapter");
        }
        uint i = 1;
        IDXGIOutput* output = null;
        if (adapter1->EnumOutputs(i, ref output)!=0)
        {
            throw new Exception("Failed to create DXGI output");
        }
        OutputDesc desc=new OutputDesc(null);
        if (output->GetDesc(ref desc)!=0)
        {
            throw new Exception("Failed to get output description");
        }
        if (output->QueryInterface<IDXGIOutput5>(out var output5)!=0)
        {
            throw new Exception("Failed to get IDXGIOutput5");
        }
        ID3D11Device* device=null;
        ID3D11DeviceContext* context=null;
        D3DFeatureLevel featureLevel=D3DFeatureLevel.Level101;
        D3DFeatureLevel[] featureLevels =
        [
            D3DFeatureLevel.Level111, D3DFeatureLevel.Level110, D3DFeatureLevel.Level101, D3DFeatureLevel.Level100
        ];
        fixed (D3DFeatureLevel* pFeatureLevels = &featureLevels[0])
        {
            D3D11 d3D11 = new D3D11(new DefaultNativeContext("d3d11"));
            if (d3D11.CreateDevice((IDXGIAdapter*)adapter1, D3DDriverType.Unknown, IntPtr.Zero,
                    (uint)CreateDeviceFlag.None,pFeatureLevels,(uint)featureLevels.Length, D3D11.SdkVersion, ref device,
                    &featureLevel, ref context)!=0)
            {
                throw new Exception("Failed to create D3D11 device");
            
            }
        }
        ID3D11DeviceContext* immediateContext = null;
        device->GetImmediateContext(ref immediateContext);
        IDXGIOutputDuplication *outputDuplication = null;
        if (output5.DuplicateOutput((IUnknown*)device, ref outputDuplication)!=0)
        {
            throw new Exception("Failed to get output duplication");
        }
        OutduplFrameInfo outduplFrameInfo = new OutduplFrameInfo();
        IDXGIResource* desktopResource = null;
        if (outputDuplication->AcquireNextFrame(1000, &outduplFrameInfo, &desktopResource)!=0)
        {
            throw new Exception("Failed to acquire next frame");
        }
        if (desktopResource->QueryInterface<ID3D11Texture2D>(out var desktopTexture)!=0)
        {
            throw new Exception("Failed to get desktop texture");
        }
        Texture2DDesc stagingTextureDesc = new()
        {
            CPUAccessFlags = (uint)CpuAccessFlag.Read,
            BindFlags = (uint)(BindFlag.None),
            Format = Format.FormatB8G8R8A8Unorm,
            Width = (uint)desc.DesktopCoordinates.Size.X,
            Height = (uint)desc.DesktopCoordinates.Size.Y,
            MiscFlags = (uint)ResourceMiscFlag.None,
            MipLevels = 1,
            ArraySize = 1,
            SampleDesc = { Count = 1, Quality = 0 },
            Usage = Usage.Staging
        };
        ID3D11Texture2D* stagingTexture = null;
        if (device->CreateTexture2D(&stagingTextureDesc,null,ref stagingTexture )!=0)
        {
            throw new Exception("Failed to create staging texture");
        
        }
        
        Texture2DDesc captureTextureDesc = new()
        {
            CPUAccessFlags = (uint)CpuAccessFlag.None,
            BindFlags = (uint)(BindFlag.RenderTarget|BindFlag.ShaderResource),
            Format = Format.FormatB8G8R8A8Unorm,
            Width = (uint)desc.DesktopCoordinates.Size.X,
            Height = (uint)desc.DesktopCoordinates.Size.Y,
            MiscFlags = (uint)ResourceMiscFlag.None,
            MipLevels = 1,
            ArraySize = 1,
            SampleDesc = { Count = 1, Quality = 0 },
            Usage = Usage.Default
        };
        ID3D11Texture2D* _captureTexture = null;
        if (device->CreateTexture2D(&captureTextureDesc,null,ref _captureTexture )!=0)
        {
            throw new Exception("Failed to create staging texture");
        
        }
        immediateContext->CopyResource((ID3D11Resource*)_captureTexture, (ID3D11Resource*)desktopTexture.Handle);
        desktopResource->Release();
        outputDuplication->ReleaseFrame();
        
        immediateContext->CopySubresourceRegion((ID3D11Resource*)stagingTexture, 0, 0, 0, 0,
            (ID3D11Resource*)_captureTexture, 0, null);
        
        MappedSubresource mappedSubresource=new MappedSubresource();
        if (immediateContext->Map((ID3D11Resource*)stagingTexture, 0, Map.Read, 0, &mappedSubresource)!=0)
        {
            throw new Exception("Failed to map staging texture");
        }
        
        var span = new ReadOnlySpan<byte>(mappedSubresource.PData,
            (int)mappedSubresource.DepthPitch);
        var image=Image.Load<Bgra32>(span);
        image.SaveAsJpeg("1.jpg");