Silvlerlight 4 development using VS 2008

My current software is based on Silverlight 3 and i am using VS 2008 and Blend 3 for development. With SL4 out in the wild, can i use my开发者_如何学编程 existing tool set (VS 2008 atleast) to develop SL4 code?

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Unfortunately not. Silverlight 4 only works with Visual Studio 2010 and Blend 4.

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It doesn't look like it's possible:

Ensure that you have the latest Visual Studio 2010 or Visual Web Developer Express 2010 installed as it is a prerequisite for developing Silverlight 4 applications using Visual Studio.

http://www.silverlight.net/getstarted/silverlight-4/