C# separation code help

im in to boids right now and steering behaviours and im triyng to make the separation between boids but i cant get the code to work can someone plz help with this ?

 static public Vector3 separation(GameObject boid, float maxseparation, float separationradius)
     {
         Vector3 force = new Vector3();
         float SEPARATION_RADIUS = separationradius;
         float MAX_SEPARATION =  maxseparation;
         int neighborCount = 0;
         List<Enemy1> boids;
         boids = new List<Enemy1>();
  
         for (int i = 0; i < boids.Count; i++) 
         {
             Enemy1 b = boids[i];
  
             if (b.skin != boid && Vector3.Distance(b.skin.transform.position, boid.transform.position) <= SEPARATION_RADIUS)
             {
                 force.x += b.skin.transform.position.x - boid.transform.position.x;
                 force.y += b.skin.transform.position.y - boid.transform.position.y;
                 neighborCount++;
             }
         }
  
         if (neighborCount != 0)
         {
             force.x /= neighborCount;
             force.y /= neighborCount;
 
             force = force * -1;
         }
  
         force.Normalize();
         force = force * MAX_SEPARATION;
 
 
         return force;
     }