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WPF- How to Make Menu control look native

I am currently learning WPF framework; I have some past (not much though) experience with Winforms. One problem I've had in both is that the menubar does not look native. I've found a workaround in Winforms, but I haven't been able to find anything for WPF. I've not had this problem in other frameworks I've used, particularly Qt.
In many pics I've seen, it looks native enough in Windows 7, but not Windows 10. I included some pics.
How it currently looks:
How it should look:
Thanks in advance!
Edit
While I have not seen the possible duplicate link, I am aware of setting the foreground/background on WPF controls. That link doesn't really answer my question. I don't want to come up with my own style at this point; all I want to do is make controls look native.
If custom styling is the only way, that's fine, but if there is another way, that would be preferable.
Thanks!

I don't think there's a quick fix to get what you want. WPF renders using DirectX, allowing for much more flexibility in styling applications. A WPF app should render exactly the same way on any version of Windows - it will not automatically adopt a native look and feel (that was actually one of the main selling points of the technology in its early days).
While MS made the default styling somewhat close to Windows at the time of release (Vista, I think?), if you want WPF controls to have a particular look you're going to have to style them yourself.

In what language these are made

I have seen some applications having such a rich layout that a person starts hating desktop applications like traditional c#.I was wondering how to make applications having GUI like this is it possible to make it in c#?

According to the title, this uses WPF, which can be used with C# and/or XAML. It can actually be used with any .NET language.

The problem is not the programming language. What you need is:
a UI framework that allows rich layouts (in C#, you'd use WPF),
and, even more important, a designer. With "designer", I mean a human, not a tool. If you look at your screenshot, you will notice that the colors of the background image match those of the buttons, that the buttons match the content circle, that the header of the content circle ("Getting Started") matches the header of the window.
So, really, this is not a matter of programming language. What you need is a design. Implementing it is the easy part (at least with technologies such as WPF).

Look at the window title... "Xceed DataGrid for WPF Recource Center". I might be going out on a limb here, but I'm guessing that it was written using WPF and C#.

Only the developers know for sure! Okay, the window title gives it away
Quick guess, they're using Windows Presentation Foundation, which isn't a language, but part of the .NET Framework (starting with 3.0).

Adding some resources here . . .
You have to use WPF for that, and probably with some custom controls.
For WPF have a look here:
Wikipedia
MSDN
Expression Studio
For already made controls you can check:
Xceed
Infragistics
Devexpress
There are a lot more out there even a lot of free ones. All the above are commercial but i think they have a few free samples.

How to use XNA in WPF?

So... I want to make a game, and I want to write it in C#. In the past, I've made a mario clone using C++ and OpenGL. I quite like OpenGL, but I don't know how well it's supported inside C#/WPF. Also, it might be beneficial to use an actual game library? I guess XNA is the game library for C#, so maybe I'll invest a bit of time learning that.
However, I want to use WPF form controls for my level editor... is there any way that I can embed an XNA (DirectX?) window inside a WPF app?
Specifically, I don't need any buttons or things inside the XNA/DirectX widget, just around it, so no mixing required...just need to get a graphics widget in my WPF form.

Nick Gravelyn explains how to do it on his blog.
Although, if it's just for an editor, you may find using WinForms is easier and better supported.

First of all, you should ask this on gamedev.stackexchange.com. But I've seen a tutorial embedding XNA.
You should check this question and this page. They are on Windows Forms, but they'll help.
Also check this and this articles.
Keep in mind one thing. XNA is meant to be used for the whole game, integration would be useful on making level editors like you say, but not for a full game.

WPF uses DirectX, and you can do direct "interop" here is a codeProject article on the subject. Here is an article i dug up where the author is using win-forms and WPF controls in an XNA project. Might be worth a look for you.

How to build UIs like skype

I want to know how can I build UIs like skype using standard .Net/C#. Is it possible at all?
Thanks

You can use Windows Presentation Foundation to build more stylish GUIs than Windows Forms. It's pretty difficult to move from Forms to WPF. You usually need a good design tool, like Expression Blend.

AFAIK skype was built using Qt4, it's rather easy to build custom gui widgets, check
C++ GUI Programming with Qt4, 2nd Edition and this tutorial.
P.S. check this to see how to build qt4 on windows using MSVC 2008.

It might be possible to build such an UI using Windows Forms, but only with a lot of custom control code or a really good component suite. But as Chris said, WPF should be the tool of your choice when you want to use .NET.
Qt4 is a really powerful C++ framework, also powering apps like Google Earth. The Qt SDK, inclduing everything you need to get started (Compiler, IDE, documentation), can be obtained here. It's licensed (among others) under the LGPL.

Windows Presentation Foundation will give you the most flexibility, but it can be hard to use. An alternative to this is Sliverlight - Version 3 is going to be capable of being used outside of the browser (similar to Adobe Air), and in some ways provides an easier development experience. You might want to consider using some third party controls to give you access to nice functionality that you wouldn't get out of box.

To my acknowledge Skype is build with Delphi an a set of third party tools, so it for sure can be done without WPF.
Take a look at the components from DevExpress or TMS.

How do I give professional look and feel to my .NET windows application?

I'm using WINFORMS not WPF.
I just know basic c# .net gui programming. I donot want the traditional windows look. I want to have my own custom look (eg. gtalk, antivirus softwares, media players, google chrome).
Actually I'm inspired by google's PICASA software. Its awesome. I want to do something like that.How can I do that? If there is something I should learn please point me.
Also I may have to write my own custom controls (like modified tree view etc..) I guess. Please give some good learning resources.

This article describes how to draw custom windows. The author also shows how to draw non-rectangular windows.
If you could use WPF instead of Windows Forms, this is a good article about customizing window drawing:
http://www.codeguru.com/csharp/.net/net_wpf/article.php/c16379/
There is also a question with some good answers here on SO:
Creating custom forms in WPF?
Update:
I think that skinning and custom drawing is fun to do from a programmers perspective, but I also think that there is almost no benefit for the user.
The creators of the platform you are developing for might have put a lot of effort into the design of their windowing toolkits.
If you just want to change some visual aspects of your application you also should take into account that you might miss some important other aspects of UI design:
consistency
accessibility
aesthetics (if you are overdoing
effects, gradients, ...)
internationalization
...
As you are developing for Windows, you also lose the skinning ability of the OS itself. And I think that some of the skins that come with newer versions of Windows are pretty good.

You can try any of the following:
telerik
Syncfusion
(source: componentsource.co.jp)
Or other components.
They do make your UI pretty.
Edit: if you want to study how they do it, you can buy the source code-- along with documentation and understand from there.

There are some commercial control libraries available.
I can recommend the Krypton Suite. It consists of the free Krypton Toolkit (which contains a lot of skinnable controls) and other non-free controls (Navigator, Ribbon, Docking, Workspace). It has some built-in palettes and renderers that allow you to make your UI look like Office 2010, Office 2007, Office 2003, ...

You want to look for +winforms +skinning. I haven't tried these, but the first hits don't look bad. Most decent skinning tools will be paid for.

From what you said, you want to develop your own custom controls. You have some frameworks for this like Qt which can use Direct3D for hardware accelerated graphics. It also have a Visual Studio plugin. There is a free LGPL version and a commercial version of it.
I remembered about Qt because you mentioned Picasa and as far as I remember, I heard the Picasa UI has been written through Qt.

You can try using "SetWindowRgn(..)" to set an arbitrary region for your window. This may range from giving a rounded rectangle shape to giving a weird looking shape to the form!
Check this out: Link.
There is another option if you are working in Vista(aero enabled), ie you can check out DwmExtendFrameIntoClientArea(..) function here: link text
You can set the form's border style to 'none' and go on to create your custom form! You then might have to create custom buttons to carry out tasks like close, minimise, maximise etc. You might even need to write code for drag and drop events..
For the background, you might need to have a look at the gradient fills to give a great effect, otherwise you can use great looking pictures as Background..! But the latter option isnt good unless you have really good pic.