What is the development platform for Windows Phone 7

If I want to develop for Windows Phone 7, what should I learn? XNA, Silverlight o开发者_开发问答r other?

Microsoft has not yet announced what the development environment will be. They say they'll get more in-depth at MIX. If I were a betting man, I'd guess you'll get XNA out of the box, followed by some light version of Silverlight.

EDIT

I'd say it's no longer a guess that it will be Silverlight and XNA just based on the MIX sessions for Windows Phone.

If you want to make applications (or even simple games), choose silverlight. If you want to make 3d games, or games with xbox live integration, choose xna :-)