Develop Reference

How to make controls stay in a distance of each other when adding them programmatically?

I have a panel, which I add controls programmatically to it. I want each control stay in a far from other controls and not stay on top of them.
for this purpose I can calculate a position for each control based on Panel's size, but it seems a bit odd.
Is there a way to make controls be added in a line and when it ended they be added in another line?

You can use a FlowLayoutPanel to achieve what you're describing. It's under Containers in the ToolBox. Set the direction to horizontal and it will flow from left to right, and wrap when it needs to.

I believe the WrapPanel class does what you're describing in WPF. Or the FlowLayoutPanel in WinForms.

You have a few options. You can use one of the containers such as FlowLayoutPanel or TableLayoutPanel. You can also nest them in each other. And you have to set the Margin property for each control you add to the containers.
Sadly the Windows Forms technology lacks on this part a little, while WPF has a very rich layout system. Even somethings like Margin doesn't always work as expected.

Docking buttons in the wpf panels

How can it be done? If there are, for example, four groups of buttons in menu-like panel. How would you dock them to their initial location if the window is resized?
I am trying this using DockPanel and HorizontalAlign, but it seems to only be work for the last button on the right when the window is resized. But how do you dock(anchor) a group of buttons? Maybe put them in border object and use HorizontalAlign for it? Is there more elegant way to do this?

To summarize the comments: I don't know your background but it seems you are used to another way of UI design where you do not explicitely have to specify grouping etc in code. While that might seem more elegant, it is not: the designer generated code is awful and the whole system is not as flexible nor srtaightforward as what WPF gives you..
With WPF you get a clear one-to-one relationship between your intent (treating buttons as a group within a layout) and the actual code (put the buttons in a stackpanel/grid/...). Or draw a border around buttons and organize them vertically within the border vs in xaml use a border with a stackpanel inside. It won't get any more elegant than that.
Read up on WPF layouts and once you'll get a grip of it you will quickly see that it is rather powerful and beatiful at the same time. I found this tutorial pretty helpful when just starting with layouts. And google provides lots and lots and lots more information, as usual.

Like stijn said, put the buttons in a Grid or a Stackpanel and you'll be fine.
You may not think it's beautifull, but it's the best solution for your problem.

WPF Control Questions

I just switched over to WPF from just regular C# .NET for the more advanced UI design controls. I have managed to become extremely confused over what should be extremely simple, and I hope someone can help.
Basically I want to have sections on either side (for the most part these will be list-boxes inside of expanders), one list-box in the bottom-middle, and then a large rich text box taking up the middle.
My understanding was that I could just take a DockPanel, set the ChildFill to true, dock each one where it should go, and leave the last one to fill the space. The list boxes alone don't seem to work at with the DockPanel, and the DockPanel does not seem to expand when I change the size of the window.
So basically my questions are...
1) Why does the DockPanel not expand/shrink when I change the size of the window?
2) Buttons seem to work fine in the Dock Panel (like all of the examples I found) but using List Boxes instead does not seem to work properly. Why is this?
3) If I put the list boxes inside of Expanders instead, if I have say two of these on the left side, and I shrink the top expander, will the bottom expander grow upwards to fill the gap?
I can't really afford anything like ActiPro, and I was not able to get the AvalonDock controls to show up on the MSVC 2010 toolbar, so I am pretty much stuck using the default controls.

1). I have just tested the DockPanel and it does expand / shrink when the Window is resized - Have you removed the Grid that is placed in the Window by default in Visual Studio? If you mean it doesn't resize proportionally to the Windows size then i think you will need to use a Grid.
2). Again, list boxes work fine for me - Can you provide some more detail explaining why they don't work properly?
3). It depends on what you mean by "Grow upwards". If the top expander is closed, only the header will be displayed and the bottom expander will move up to take the space taken by the first expanders content (this is the default behaviour).
Do you have some XAML you can post as this will help identify your problems.

How to scroll two components with one's vertical scroll bar only

I'm working on displaying lines numbers for a richTextBox on C#, I tried many components but non of them worked with me, so I'm working on my own one.
I implemented that using the richTextBox + ListBox.
But, I'm having a problem when scrolling the richtextbox,the ListBox wont scroll, also I need not the vScrollBar of the List box to appear during scroll how can I accomplish this?
I mean scrolling both (richTextBox+listBox) when scrolling the richTextBox only, any suggestions?

You can't make this reliable. RichTextBox allows continuous scrolling where only a portion of a line is in view. ListBox does not. The line numbers will not line up with the lines most of the time.
Use a real text editor, like ScintillaNET. It supports showing line numbers.

Add a listener on an OnScroll* event and update the other control as one of them is scrolled.

How to use VScrollBar and HScrollBar together with a RichTextBox?

In my form I have a RichTextBox. I also have a VScrollBar and HScrollBar. I set the RichTextBox property ScrollBars to None so I can use the new scroll bars for it. Thats where I hit a problem, how do I do it? I searched online and found nothing for "c# richtextbox vscrollbar"
Please add references to articles to your answers so I can learn how it works.

I don't know if there is a way to do what you want. The best thing I can thing of would be to try and find the right position in the text, then Select() and ScrollToCaret(). I usually only use that trick to force a TextBox/RichTextBox to scroll to the very end, though. It wouldn't be very easy to use it for what you want.
Is there a reason why you don't want to use the default scroll bars?
In my experience, I've rarely had any luck anytime I've tried to use custom scroll bars in C# - especially with a control that has the ability to auto-scroll built it.
The only time I've used them without too much trouble is with a third party control that didn't have an auto-scroll capability.