linqpad 4.0 and code only

How can I use linqpad with code only in ef 4.

I mean how to reference met开发者_运维知识库adata when there is no edmx file?

I think LINQPad will need to be updated to support this feature. Have you tried the latest beta? There's no reason LINQPad couldn't support code only, but it would need specific support for it. That said, I don't think LINQPad reads the EDMX directly; rather, I think it uses the generated code.

As of today (4/29/11) there is a new LINQPad beta (v4.34.2) that will work with EF 4.1 Code First.