C# combine two different sets of lits for iteration
===

I have lists of two Shapes - Rectangles and Circles.
They both share 3 common properties - ID , Type and Bound
Circles have 2 extra properties - Range and Center 

How can i join lists of each type into a single list so i can iterate over them so i don't have to type two foreach cycles


Could this be donne in a better way than combining the lits ? 

    public interface IRectangle
    {
        string Id { get; set; }
        GeoLocationTypes Type { get; set; }
        Bounds Bounds { get; set; }
    }

    public class Rectangle : IRectangle
    {
        public string Id { get; set; }

        public GeoLocationTypes Type { get; set; }

        public Bounds Bounds { get; set; }
    }

    
    public interface ICircle
    {
        string Id { get; set; }
        GeoLocationTypes Type { get; set; }
        Bounds Bounds { get; set; }
        float Radius { get; set; }
        Coordinates Center { get; set; }
    }

    public class Circle : ICircle
    {
        public string Id { get; set; }

        public GeoLocationTypes Type { get; set; }

        
        public Bounds Bounds { get; set; }

        public float Radius { get; set; }

        public Coordinates Center { get; set; }
    }

    public class Bounds
    {
        public Coordinates NE { get; set; }

        public Coordinates SW { get; set; }
    }

    public class Coordinates
    {
        public float Lat { get; set; }

        public float Lng { get; set; }
    }
