Answer by Jakub Lortz for Add onto method in parent class from inherited class

You can use base to call the base class' implementation of Start(). You also have to override the virtual method in the child class:

protected override void Start () {    base.Start();    BlahBlahBlah();    Stuff();}

You can also use template method pattern to define the skeleton of the method in the base class and provide implementation of some parts in derived classes.

public void Start() {    MyRigidBody = gameObject.GetComponent<Rigidbody>();    if(Controls.Length < 4)        throw new System.Exception("Controls not assigned correctly");    DoSomethingElse();}protected virtual void DoSomethingElse(){    //can be empty in base class, derived classes provide the implementation}

The Start method is not virtual. If you want to modify the behavior of Start method in derived classes, you override DoSomethingElse().