Question

How to prevent User Control from being initialized? I want to initialize it by myself, not in the constructor in InitializeComponent(); ?

Answer 1

Well that seems silly, but you have already answered your question; remove the call to InitializeComponent(). Have fun recreating the auto-generated designer code!

EDIT:

Ok, so per your edit we know what the actual problem you are trying to solve is:

Thanks for replies, but the problem is a little bit different. This control isn’t mine (it is windows live control). I want all other controls in the page to be properly initialized, and this one should be loaded later, on user demand (it connects to the internet, it is wp7 application). How to achieve this?

Thus, you need to add the control at runtime instead of at design time. This is easy to do.

var ctrl = new SomeControl();
// initialize control properties...

// this is your user control, a control within 
// the user control, whatever the parent should be.
parentControl.Children.Add(ctrl);