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How to take high quality photo from integrated camera in WPF

I'm implementing WPF app where I need to take high quality photos from integrated camera. So far I've been successful with capturing video and taking frames from it (described for example here: Wpf and C # capture webcam and network cameras).
But this is not what I want - because video frame quality is not so great. I have MS Surface 4 Pro which has 8Mpx camera with full HD video support and with the above method I'm able to just get full HD frame from it. But I would like to have full 8Mpx picture, like it is possible to take in the native Windows Camera app.
In UWP I would probably have been successful with CameraCaptureUI class, but I didn't find any clues for WPF.
Does anyone has an idea how this could be implemented?

I've found out that XAML Islands do work with .NET Framework 4.8. So I've been able to implement a WPF solution using UWP components MediaCapture and CaptureElement. With that I can take photos with full resolution which was my goal.
Simple sample project can be found here: https://github.com/ondrasvoboda/WPFCamera, consider it just as a proof of concept.

If your app will run on Windows 10 or above, you can now use most of the APIs from Windows 10 in a WPF application.
https://blogs.windows.com/windowsdeveloper/2019/04/30/calling-windows-10-apis-from-a-desktop-application-just-got-easier/

How can I use DirectX to create a video editor in C#?

Is it possible to create a video editor in C# by using DirectX or should I use a different SDK to make a video editor? Keep in mind that I need to be able to animate objects (shapes and paths like in After Effects if possible).

There are really two Windows APIs you should consider for a video editor:
Media Foundation which is the modern Windows media API for video and audio.
DirectShow which is an older technology that dates back to the late 90s.
The DirectX SDK is not applicable to video application development. DirectShow was pulled out of the DirectX SDK back in April 2005. Media Foundation never shipped in the DirectX SDK. See DirectX SDKs of a certain age.
Note that even the DirectX SDK itself is legacy these days. See MSDN
Instead, these APIs are available in the Windows SDK. If you are using Visual Studio, you likely already have a copy of this SDK. For a list of versions, see A Brief History of Windows SDKs
To make use of either of these APIs from C#, you should take a look at Media Foundation and directshow.net.
There is a Direct3D 11 Video technology that is part of the DirectX 11.1 Runtime (Windows 8 SDK or later). It is extremely low-level and is really intended for things like Media Foundation itself to use as a renderer with some ability to do GPU acceleration of the processing.

Microsoft.DirectX.AudioVideoPlayback alternative in SharpDX

I want to play a video, and this is how it is done in DirectX:
Microsoft.DirectX.AudioVideoPlayback.Video video = new Video(fileName);
video.Owner = panel1;
video.Play();
But I can't find AudioVideoPlayback in SharpDX, the DirectX API for .NET.
Is it supported in SharpDX? Any tip is appreciated.

For playing video in Windows 8.1 store apps and Windows Phone 8.1, the preferred method is using the XAML tools Microsoft provides in their framework that makes this fairly simple. See Quickstart: video and audio (XAML) for more details.
Managed DirectX was released in 2002[1] and based on DirectX 9. It has been deprecated for a while, which is why for users of managed code, libraries like SharpDX exist to provide a managed wrapper around the unmanaged (C++). In Windows Store and Windows 8.1 phone apps, DirectX 11 is required, which is why Managed DirectX wasn't working for you.

Can I code Windows 8 RT Games in C#

Is it possible to code a Windows 8 RT and/or Windows 8 Phone game using C#?

I have done a fair amount of research on the "Games in C#" thing, so I thought I would post it for others:
XNA is an easy way to make a C# game. You can post a new XNA game on the Windows Store and it will work fine.
However, you cannot make a Windows Phone 8 or Windows 8 game using XNA. (You can only target version 7.1 of Windows Phone.) The new APIs for these operating systems are not supported in XNA.
However, both Windows Phone 8 and Windows 8 will run XNA apps. Those apps just cannot target any features that are specific to Windows 8 or Windows 8 Phone.
So to sum up. The current version of XNA (4.0) supports the older API to talk to Windows and Windows Phone. They can still run on Windows 8, but you can't use the newer stuff.
Microsoft does not have an offering to make games in C# for the new Windows 8 and Windows Phone 8 APIs.
However, if you don't mind using open source projects there are some things you can do to write a game in C# that can use the newer Windows 8 and Windows Phone 8 API:
MONOGAME
If you want to use XNA's api to make games for the new Windows 8 APIs you can use MonoGame (this is what I use). It is an open source api that implements the XNA API but has plugins for IOS, Android and Windows 8. This is a really good cross platform option. 3D graphics recently became supported by MonoGame(i.e. Infinite Flight, Armed). (Note: I am not affiliated with MonoGame in any way.)
SHARP DX (DirectX)
If you want a Microsoft Supported way to make a game that targets the Windows 8 API your best bet is DirectX. But Direct X is a C++ API. It is also really really hard.
If you are wanting to make a 2D game (like Plants vs Zombies or Angry Birds) then Direct X is overkill. You are far better off going the MonoGame route. I spent several days digging through tutorials and working very hard to understand Direct X. By the end of that time I was rewarded with the ability to draw a single triangle on the screen. (That same amount of time had my game loop going and sprites moving around in MonoGame.)
So I repeat, if you don't already know DirectX and you are making a 2D app, don't go down the DirectX/SharpDX road.
The DirectX 2D route is further hindered by Windows Phone 8 not supporting Direct2D. DirectX has a subset called Direct2D for 2D rendering. However, this subset is not supported on Windows Phone 8. The "replacement" (for now) is the Direct X toolkit.
If you are still all in with the Direct X road, then you can write it in C# using SharpDX. It is a C# wrapper for DirectX that works very well (though I don't know if it supports the Direct X Toolkit).
SUMMARY
The short of it (for me) is that Microsoft did not update their APIs for C# game development to support the new stuff in Windows 8 and Windows Phone 8. But MonoGame lets you use the XNA API to do just that. It also allows you to write cross platform games, so it is better anyway. (You get porting to IOS and Android for "Free".)
My game is well underway in MonoGame with no issues so far!

Making windows mobile 6 application forms generalized to all resolution [480*640] and [320*320]?

I have a Windows mobile 6 application witch is designed for 480 x 640 VGA Resolution mobile.
Now the application is needed to install on *320*320 square Mobiles*...
I have some images for every form designed for *480*640* for banner image...
How can i make my application to adapt all resolution without changing all form design....?
and can i use the same image for square Device too ???
please help me on this.....
Handling Different Resolutions in Windows mobile app 6 in Visual Studio 2008 for .NET CF.
Can i use Same Forms to manage screen resolution and landscape/Portrait mode too...
please help with code or link to show me right way....

It looks like MSDN has a number of articles that should help you on your way:
Adapt Your App (vague overview)
Adaptable Apps For Windows Mobile explains various techniques for supporting dynamic screens
The Mobile Client Software Factory provides a pattern for helping with dynamic screens
Finally, Windows Marketplace for Mobile: Certification Testing, Hopper, and Multiple Screen Support provides some fairly up to date information on the certificate requirements for the WM6 marketplace as they relate to dynamic screens.