How to find the concrete type of interface instance when using reflection?

I'm currently trying to create an instance of an object that was defined as an interface. Specifically:

public static class A {
    public static IList<string> SampleList { get; set; }

    public void Initialize() { 
        SampleList = new List<string>();
    }
}

// In some other class
var propertyInfo = typeof(A).GetProperty("SampleList");
propertyInfo.PropertyType.GetConstructors().Any(); // false
// ^ I would like this to be true

When SampleList is instead typed as a List instead of the interface (IList) I'm able to produce a constructor and instantiate an instance of this list. I have the same luck with Arrays + other instances that aren't defined as an interface.

Something else I noticed is that when I use List, and invoke PropertyType.GetInterfaces() I get a list of 8 interfaces while when I invoke the same command using an IList instance I only get 3 interfaces. In general I'm getting a lot less information.

I was wondering if it was possible to find out the concrete class itself? If so, how?