Downloading Tools to Develop Apps for Windows Phone 7
To begin developing apps for Windows Phone 7, you need some basic tools. Luckily, Microsoft's App Hub is all about Windows Phone 7. Follow these steps, using the PC you plan to use for development:
Go to the App Hub.
Click the link in the upper-left corner that says "Download the free tools."
In the "Download the Free Tools" section, click the link that says, "Download and install the Windows Phone Developer Tools."
The application download screen appears, allowing you to download the Visual Studio 2010 Express application.
You don't need to download the release notes.
The smart loader is smart enough to check your machine and download only what you need.
In that same section, click the link that says, "Download and install the Windows Phone Developer Tools January 2011 Update."
Again, the download screen appears. You don't need to download these release notes either.
Go get a drink.
The January 2011 update takes a while to install. Be patient.
Finally, click the link that says, "Windows Phone Developer Tools Fix."
After you've followed these steps, your PC is ready for you to start programming.