The OnTriggerEnter property of the Collider class is an event that is triggered when another collider enters the trigger area of this collider. This property is of type System.Action<Collider>, allowing you to assign a delegate that will be called with the entering collider as a parameter.
To use the OnTriggerEnter property, you need to ensure that the collider is set as a trigger by setting the IsTrigger property to true. Then, you can assign a method to OnTriggerEnter to handle the event when another collider enters the trigger area.
// Example of using OnTriggerEnter
Collider myCollider = new Collider();
myCollider.IsTrigger = true;
myCollider.OnTriggerEnter = (Collider other) =>
{
// Handle the event when another collider enters this trigger
Log.Info($"Collider {other} has entered the trigger area.");
};