Simple Factory implementation in C#

simple-factory.cs

public interface IShapeRenderer { }

public class CircleRenderer : IShapeRenderer {  }
public class TriangleRenderer : IShapeRenderer {  }
public class SquareRenderer : IShapeRenderer {  }

public interface IShapeRendererFactory
{
    IShapeRenderer Create(string type);
}

public class ShapeRendererFactory : IShapeRendererFactory
{
    public IShapeRenderer Create(string type)
    {
        return type.ToLower() switch
        {
            "circle" => new CircleRenderer(),
            "triangle" => new TriangleRenderer(),
            "square" => new SquareRenderer(),
            _ => throw new NotImplementedException(),
        };
    }
}