Readonly Fields

I have been through the documentation but cannot find an example of how to do the following:

Given the class:

public class Plane
{
     private readonly double length;
     public double Length { get => length; }
     public int Rows { get; set; }

     public Plane(int rows, double Length)
     {
          Rows = rows;
          length = Length;
     }

     public Plane(double Length)
     {
          length = Length;
     }
}

var p = new Plane(4.33);

How do I serialize this as <Plane Length="4.33" /> ? I explicitly do not want the Rows to get serialized and the Length must be as an attribute.

Thanks

[Jones-Adam]

Thanks Mike!

[Mike-E-angelo]

Happy New Year. 😃 Closing this issue as the latest code addresses it to the best of our understanding. Please feel free to comment here and/or re-open a new issue if there is something not captured and needs to be addressed. Thank you!