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Adjust images with window C#

So, I'm basically new using WinForms in Visual Studio 2017
Probably this questions are already answered but I can't find how to do it.
I just want to make the window bigger, but the images adjusting while I do it, any advise?
I've doing this all with the Menu and Toolbox, so basically I don't have any code to show
Edit:
I found a way to adjust the image but it needs to be full screen with PictureBox and activate 'Parent Container', but it's not what I need

Taskbar icon looks pixelated using ClickOnce

When I run my wpf application in debug mode, the icon on the taskbar looks fine (left image), but after I published and open the application, the icon looks pixelated (right image).
I've referred to this link and I set the icon image to 256x256, but still looks pixelated.
Please help.

try using an ico editor to save the icon with all the correct resolutions (the OS will display the correct one). I use icofx, but there are many options if you google it - they should all correct your image proportions. Most should have an equivalent option to the 'save windows icon' (in icofx) where you select all the resolutions you want to add to the file.
Just another thought - is you icon a resource file? If so you may need to remove it then add it again and make sure the resource is set to publish correctly (so you are not using an old version).

Is there a button for moving items up and down in a listview?

I am coding a C# forms application where I have a ListView with multiple items.
I am wanting to move these items up and down and am wondering if there is a forms control that I can use for this, or should I get my own image, and add this to a simple button for both the up and down action?

Yes you simply create your own button with the desired image.
If you like to use the Microsoft images, you should take a look at the folder %ProgramFiles(x86)%\Microsoft Visual Studio 10.0\Common7\VS2010ImageLibrary. There you'll find (in another sub-folder) a VS2010ImageLibrary.zip file which contains lots of Microsoft images you are allowed to use within your applications. If you can't find your desired resolution you can take a look if you find a corresponding .ico file, cause these normally contains more resolutions then directly available as .png or .bmp file.

How to use arrowkeys to scroll through images in a folder with picturebox?

I'm in the process of creating a pretty simple image viewer.
I've got a Picturebox control to display the image. And I'd like to be able to use the arrow keys to scroll through all of the images in a folder - basically, the way the default Windows picture viewer does. At the moment, I have an Open File Dialog to choose the image to display, but I'm not sure where to go from here.
Pretty new to programming, so any help would be greatly appreciated.
:)

Have a look at the KeyPress Event, you can get the information about the pressed key in its KeyPressEventArgs.

c# express: where is my picbox?

I am not a visual studio programmer but I need to whip up a quick app to display an image and manipulate it's height and width using a slider. I've done the quick google and all of the information talks about using picturebox(picbox) as the image containing control but I don't seem to have a picbox control in my VS C# express install.
Should it be missing? How do I get it back or install it? What are my alternatives?

If you've looked carefully in the toolbox and couldn't find it, you may have accidentally deleted the icon. Right click on the "All Windows Forms" section header in the toolbox and select "Choose Items". Check the checkbox near the "PictureBox" control. It'll show up in the toolbox.
In WPF, you should be looking for the "Image" control instead.

It was that I was in a WPF project rather than a windows form project like Mehrdad pointed out