windows phone 7 appstore?

I am new to windows mobile.is microsoft's http://marketplace.windowsphone.com/ enough to get applications for windows phone 7 OS?I have heard about windows phone 7 os is differed from windows mob开发者_如何学Pythonile 6.5 OS.can we download apps for both from same app store?The Application developed for previous versions will run in windows mobile phone 7?

The development and software for WP7 is very separate to WM6.5 and earlier:

• "Back end code" can be considered roughly equivalent - WP7 uses a version of the Compact Framework
• but WP7 is a much more closed/controlled/managed environment.
• and the UI layers for WP7 is very different to WM6 - WP7 is Silverlight and XNA, WM6 is mainly "winforms"

For getting started on WP7 see - http://create.msdn.com

While both WM6 and WP7 app stores are both managed through http://create.msdn.com the marketplaces themselves are very separate entities - apps from 6 cannot be used on 7, and apps on 7 cannot be used on 6...