Where is "AsDynamic()"?

Question

I've seen use of a method called AsDynamic(). IIRC it was an extension method. The idea is that for any object you can call myObject.AsDynamic() and get a dynamic version of it.

Thing is, I just can't find the AsDynamic() method, despite much Googling. I'm assuming it's something actually have implemented themselves, and I'd like to do the same.

I'm using .NET 4 client profile, and am very confused. :)

Many thanks in advance.

Answer 1

Turns out I was right - it was something someone (Greg Young) had a specific implementation for. The details of the implementation were taken from David Ebbo's blog:

Use C# 4.0 dynamic to drastically simplify your private reflection code

Answer 2

You can just assign the variable in a dynamic var

Foo foo = GetFooFromSommehere();
dynamic dyn = foo;

Or cast it:

Foo foo = GetFooFromSommehere();
var dyn = (dynamic) foo;

Why should there be AsDynamic() method?
The ToList() method actually does stuff instead of casting unlike with dynamic.