Question

I have lists of two Shapes – Rectangles and Circles.
They both share 3 common properties – ID , Type and Bounds

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 lists ?

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; }
}

Answer 1

Make both IRectangle and ICircle inherit from a shared type – say IShape.

A List<IShape> will then be able to take any IRectangle and ICircle types and their inheriting types.

Since both IRectangle and ICircle share a number of properties, you can do this:

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

public interface ICircle : IShape
{
    float Radius { get; set; }
    Coordinates Center { get; set; }
}

public interface IRectangle : IShape
{
}