using System;
using System.Collections.Generic;

public class Test
{
	public static void Main()
	{
		// your code goes here
		var x = new Product
          { Options = new OptionData[]
{ new OptionData // fist option
    { Id = Guid.NewGuid()
    }
, new OptionData // second option
    { Id = Guid.NewGuid()
    }
}
          };
	}
}

public class Product
{
    public string BrandDescription { get; set; }

    public string StyleNumber { get; set; }

    public IEnumerable<OptionData> Options { get; set; }
}

public class OptionData
  {
    public Guid Id { get; set; }

    public Colour PrimaryColour { get; set; }

    public Colour SecondaryColour { get; set; }
  }

  public class Colour
  {
    public string Name { get; set; }
  }