Can you detect if a C# field has been assigned a default value?

Say you have a class declaration, e.g.:

class MyClass
{
  int myInt=7;
  int myOtherInt;
}

Now, is there a way in generic code, using reflection (or any other means, for that matter), that I can deduce that myInt has a default value assigned, whereas myOtherInt does not? Note the difference between being initialised with an explicit default value, and being left to it's implicit default value (myOtherInt will be initialised to 0, by default).

From my own research it looks like there is no way to do this - but I thought I'd ask here before giving up.

[Edit]

Even with nullable and reference types I want to distingush between those that have been left as null, and those that have been explicitly initialised to null. This is so that I can say that fields with an initialiser are "optional" and other fields are "mandatory". At the moment I'm having to do this using attributes - which niggles me with their redundancy of information in this case.