There is no specification yet, but CTP is available for playback, but note that this does not yet include all the functions described in the (preliminary) documentation - in particular, many dynamic functions are missing (in particular, operator support) (which means: C # language / compiler that work with dynamic ; for everyone I know, the runtime supports them, but the language has not been created yet).
It will also be interesting to know how many of the new Expression methods are supported by the language when compiling lambda.
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