Unity on enter trigger with a certain layer code example

Example 1: unity on trigger enter

//for unity c#

private void OnTriggerEnter(Collider other)
{
    // code
}

Example 2: unity c# on trigger enter with specific gameobject

void OnTriggerEnter(Collider other)
    {
        if(other.gameObject.name == "Object name") 
			//Object name is the name of the GameObject you want to check for collisions with.
        {
			//What you want to do on trigger enter
        }
    }