public and serialized Fields not showing

Hello all,

My variables are not showing in the editor.
(only normal mode, not debug)
I searched in the internet but could not find anything.

They are either public or serialized.
Errors are enabled in the console
There are no compiling errors.
There are no problems running the program.

This one works:
public bool allChildrenActive;
This one doesnt:
public bool allChildrenActive { get; set; }


Details:
I am using an interface for the script
(public interface IParentObject )

Code:...

public and serialized Fields not showing