Public property with private getter is included in URL

[Poooel]

Hello everybody,

I don't know if this is an issue or a misunderstanding of Refit but here it is:
For some calls to my web service I have an object to be serialized as parameters in the URL. The object has some public properties with public getters and some public properties with private getters. The problem is, when sending a request, the public properties with private getters are sent in the URL.

Here is the object:

public class Page
{
    public int Number { get; set; }
    public int Size { get; set; }
    public string Sort
    {
        get
        {
            return SortMember + "," + (SortDirection == SortDirection.ASC ? "asc" : "desc");
        }
    }

    public string SortMember { private get; set; }
    public SortDirection SortDirection { private get; set; }
} 

Here is the call in the Refit interface:

[Get("")]
Task<Response<Company>> FindAll(string socialReason, Page page);

You can see in this snippet from Fiddler the properties in the URL: