Why are lambda expressions not “interned”?

Question

Strings are reference types, but they are immutable. This allows for them to be interned by the compiler; everywhere the same string literal appears, the same objec

Answer 1

In general, there is no distinction between string variables which refer to the same String instance, versus two variables which refer to different strings that happen to contain the same sequence of characters. The same is not true of delegates.

Suppose I have two delegates, assigned to two different lambda expressions. I then subscribe both delegates to an event handler, and unsubscribe one. What should be the result?

It would be useful if there were a way in vb or C# to designate that an anonymous method or lambda which does not make reference to Me/this should be regarded as a static method, producing a single delegate which could be reused throughout the life of the application. There is no syntax to indicate that, however, and for the compiler to decide to have different lambda expressions return the same instance would be a potentially breaking change.

EDIT I guess the spec allows it, even though it could be a potentially breaking change if any code were to rely upon the instances being distinct.