Ordering an array of GO based on interfaced variables using linq.

So for example I have characters with this script:

 public class Player : MonoBehaviour, IEntity {
      private int  _speed = 5; //(Different characters have different speeds)
     public  int Speed { get{return _speed;} set{_speed = value;} } 
  }

with this interface:

 public interface IEntity{
 
     int Speed { get; set; }
 }

And I want to order an array of all players. I researched and came up with this function but it doesn't work. Can anyone point me in the right direction? thanks.

 .
 .
 .
         var sortedArray = _allEntities.OrderBy(go => CompareCondition(go)).ToArray();
     }
 
    int CompareCondition(GameObject go)
     {
         var property = (IEntity)go.GetComponent(typeof(IEntity));
         return property.Speed;
     }