In my application I have a class which has properties of user-defined types like this:

class MyType
{
    public A MyProperty
    {
        get;
        set;
    }
}
class A
{
    .....some methods and proeprties
}

for some operations that I need to perform from my main program, I create a List of MyProperty whenever creating object of MyType and pass it to my main program and there I perform different operation on these properties which reflects in there instances also. Is there any way by which I could get the object instance for any particular MyProperty from that property in the list.