Select method is not called using LinQ query syntax

Question

I want to enable LinQ query syntax over my classes. I think query syntax is translated to method syntax, for example:

var query = from p in new Class1

        

Answer 1

I'm pretty sure that the translation from query syntax to method syntax optimizes the call to Select away if it states an identity projection.

Since p => p would project everything to itself and the Where clause already added an abstraction layer between the source sequence and the result, this call is no longer necessary.

So

var query = from p in new Class1()
            where p.Id == "1000"
            select p;

is only translated to

var query = new Class1().Where(p => p.Id == "1000");

But I admit that I only guess that and am still searching for the relevant specification part.
Update: Jon was faster