how to get an object which contain an specific class object. reflect

for example. I have an class B instance object B1.

there is another struct c's  class B property also is reference B1.  such as c.Bproperty = B1. And another struct d's  class  B property also is reference B1  Now, I get the object B1, and I want to get which struct instance has property reference the B1, what should I do? I think I can use reflect.

thank you