help with method overloading

Code (CSharp):

1. [I][COLOR=#ff0000]private void OnParticleCollisionManual(GameObject other, int aliveParticles = -1)[/COLOR][/I]
2.     {
3.         collisionEvents.Clear();
4.         var aliveEvents = initiatorPS.GetCollisionEvents(other, collisionEvents);
5.         for (int i = 0; i < aliveEvents; i++)
6.         {
7.             var angle = Vector3.Angle(collisionEvents[i].normal, Vector3.up);
8.             if (angle > MaxGroundAngleDeviation) continue;
9.             if (InstantiateWhenZeroSpeed)
10.             {
11.                 if (collisionEvents[i].velocity.sqrMagnitude > 0.1f) continue;
12.                 var isNearDistance = false;
13.                 for (int j = 0; j < aliveParticles; j++)
14.                 {
15.                     var distance = Vector3.Distance(collisionEvents[i].intersection, particles[j].position);
16.                     if (distance < MinDistanceBetweenDecals) isNearDistance = true;
17.                 }
18.                 if (isNearDistance) continue;
19.             }
20.             var emiter = new ParticleSystem.EmitParams();
21.             emiter.position = collisionEvents[i].intersection + collisionEvents[i].normal * MinDistanceBetweenSurface;
22.             var rotation = Quaternion.LookRotation(-collisionEvents[i].normal).eulerAngles;
23.             rotation.z = Random.Range(0, 360);
24.             emiter.rotation3D = rotation;
25.  
26.             DecalParticles.Emit(emiter, 1);
27.         }
28.     }

Code (CSharp):

1. void OnParticleCollision(GameObject other)
2.     {
3.         if (InstantiateWhenZeroSpeed)
4.         {
5.             if (!collidedGameObjects.Contains(other))
6.                [I][COLOR=#ff0000] collidedGameObjects.Add(other);[/COLOR][/I]
7.         }
8.         else
9.         {
10.             OnParticleCollisionManual(other);
11.         }
12.     }
13. }

I cant use default parameters and these 2 functions use it. I need to change them to not use default parameters. I heard of method overloading, but when i tried i couldnt get it to work. Can someone help me with it?

Edit: the code snippets that have "color" in front of them are the issue.

 

Unfortunately, callback methods cannot be overloaded. In order for this to work, the Unity developers would have to modify the MonoBehavior class and implement the new overloaded method.