Creating a list with trigger

How can I use

void OnCollisionEnter(Collision collision){

if (collision.gameObject.tag == “Enemy”){
//stuff
}
}

to create a list of transforms ?

I am not sure if this is what you want…

private List<Transform> transforms = new List<Transform>();

void OnCollisionEnter(Collision collision)
{
    if (collision.gameObject.tag == "Enemy")
    {
        //stuff 
        transforms.Add(collision.gameObject.transform);
    } 
}