Chapter 8 Quick Reference

Chapter 8 Quick Reference

To	Do this
Copy a value type variable	Simply make the copy. Because the variable is a value type, you will have two copies of the same value. For example: int i = 42; int copyi = i;
Copy a reference type variable	Simply make the copy. Because the variable is a reference type, you will have two references to the same object. For example: Circle c = new Circle(42);  Circle refc = c;
Pass an argument to a ref parameter	Prefix the argument with the ref keyword. This makes the parameter an alias for the actual argument rather than a copy of the argument. For example: static void Main()  {      int arg = 42;      DoWork(ref arg);      Console.WriteLine(arg);  }
Pass an argument to an out parameter	Prefix the argument with the out keyword. This makes the parameter an alias for the actual argument rather than a copy of the argument. For example: static void Main()  {      int arg = 42;      DoWork(out arg);      Console.WriteLine(arg);  }
Box a value	Initialize or assign a variable of type object to the value. For example: object o = 42;
Unbox a value	Cast the object reference that refers to the boxed value to the type of the value. For example: int i = (int)o;