C# Emit IL -- push value of some object onto stack?

I create a dynamic method, i.e.:

class MyClass
{
    private void object _o = <whatever>;

    void CreateDynamicMethod()
    {
       DynamicMethod dm = new DynamicMethod("Test", ...);

       // emit various IL

       // need to push _o onto stack here
    }
}

The 2nd comment, I want to push the value of _o currently onto the stack. I don't want to push the reference of _o as it will change as I build the dynamic method.

So lets say _o = 5, I want to push the 5, if _o contains a List, I want to push that, if it contains a string, I want to push the string.

The dynamic method (Test) is a static method and its obviously not going to have the this pointer of MyClass to get the field. I can't even put it in a static variable as that will be accessed during the execution of Test() and not while I'm building the method.

Even if I had the this pointer, the _o is not going to have the right value at Test() execution time.

Any suggestions?