C# How to convert an Expression> to an Expression>

Question

I have used C# expressions before based on lamdas, but I have no experience composing them by hand. Given an Expression> originalPredi

Answer 1

There is no implicit way to do the translation. You have to wrap your existing delegate inside a lambda that creates a new type from the argument type:

var translatedPredicate = x => originalPredicate(OtherTypeFromSomeType(x))

Where OtherTypeFromSomeType creates the OtherType instance from the SomeType argument.