Silverlight 4 prints by rasterizing the content to bitmap and sending this bitmap to printer. This has many unpleasant side effects - print jobs are huge, especially on high DPI printers and long documents, printing to PDF or XPS is essentially useless, because the output contains just bitmaps, etc.
Please, implement proper vector printing like WPF, Flash, GDI, Windows Forms etc.

I would like to have unit testing integrated in Visual studio, just like other unit test projects. And not need a browser session for this. Also it enables msbuild unit testing

WP7 runs Silverlight "natively" but it's my understanding that it can't access SL content embedded in web pages.

Actually, it is not possible to generate a bitmap image (using WriteableBitmap) and send the rendered image to a server (or write it in the IsolatedStorage). We have to rely on some 3rd-party library to encode the image. A solution would be to have a JPEG encoder class which simply receive a Pixel array, the width and the height of the image, and return a stream object of the encoded image. This class should allow background processing (ie, can execute on a background thread, not the UI thread)

the ability of making SL app look like a resident app will definitely attract more developers in creating more user-friendly apps.

Specifically, the ability to do the following behind a user-prompted action (i.e. a button click event just like all the other trust-sensitive actions):

- Uninstall the OOB app if it's installed.

- Launch an OOB app if it's installed (would allow for developing an experience similar to click-once)

To develop everything with C# visual studio an to take all markets. A single silverlight application for every smartphone

Mousedown/up isn't good enough

i know that the programmer is able to do Click and Doubleclick himself. But such events should be there by default !

using Mouseup or Mousedown as Click introduce bugs all over the place !

Doubleclick is also needed for better apps.

According to msdn: "Adorners are a special type of FrameworkElement, used to provide visual cues to a user. Among other uses, Adorners can be used to add functional handles to elements or provide state information about a control. "

And that's why I want them in Silverlight! :)
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Jacek Ciereszko

P2P messengers, games, computing.

Currently Silverlight 3 is a good platform for 2D casual games but lacks the control of, say, XNA. Porting the 2D XNA API to Silverlight would make it a much better platform for game development (as a separate library). This is definitely possible (see SilverSprite on CodePlex), but official Microsoft support would be much better.

It would be really nice if I didn't have to implement an event handler if all I wanted to do was change the visibility of an element.

Without having to replace sidebar64.exe (Windows Gadget)

I would like to be able to edit the code while debugging in Visual Studio, I lose too much time, stopping the applications, compiling and setting the scenario until I can test any minor change

silverlight for iOS and android is the top need