Using reflection to find interfaces implemented

Question

I have the following case:

public interface IPerson { .. }    
public class Person : IPerson { .. }    
public class User : Person { .. }

Answer 1

var control = _container.Resolve(objType); 
var prop = viewType.GetProperty("SomeUser");
if ((prop != null) && (prop.PropertyType.GetInterfaces().Contains(typeof(IPerson))) 
{ .. }