Lambda to Expression tree conversion

Question

I will keep it really simple,

How do I get expression tree out of lambda??

or from query expression ?

Answer 1

Konrad's reply is exact. You need to assign the lambda expression to Expression> in order for the compiler to generate the expression tree. If you get a lambda as a Func<...>, Action<...> or other delegate type, all you have is a bunch of IL instructions.

If you really need to be able to convert an IL-compiled lambda back into an expression tree, you'd have to decompile it (e.g. do what Lutz Roeder's Reflector tool does). I'd suggest having a look at the Cecil library, which provides advanced IL manipulation support and could save you quite some time.