The Robot Factory

The following is one possible solution to this challenge.

using System;
using System.Collections.Generic;
using System.Dynamic;

int nextID = 1;

while (true)
{
    dynamic robot = new ExpandoObject();
    robot.ID = nextID;
    nextID++;

    Console.WriteLine($"You are producing robot #{robot.ID}");

    Console.Write("Do you want to name this robot? ");
    if (Console.ReadLine() == "yes")
    {
        Console.Write("What is its name? ");
        robot.Name = Console.ReadLine();
    }

    Console.Write("Does this robot have a specific size? ");
    if (Console.ReadLine() == "yes")
    {
        Console.Write("What is its height? ");
        robot.Height = Convert.ToSingle(Console.ReadLine());

        Console.Write("What is its width? ");
        robot.Width = Convert.ToSingle(Console.ReadLine());
    }

    Console.Write("Does this robot need to be a specific color? ");
    if (Console.ReadLine() == "yes")
    {
        Console.Write("What color? ");
        robot.Color = Console.ReadLine();
    }

    foreach (KeyValuePair<string, object> property in (IDictionary<string, object>)robot)
        Console.WriteLine($"{property.Key}: {property.Value}");
}