This print for content only-size & color not accurate 7" X 9-1/4" / casebound / malloy

■

Source Code

The ValueAndReferenceTypes project is located under the Chapter 4 subdirectory.

Passing Reference Types by Value

Reference types or value types can obviously be passed as parameters to type members. However,

passing a reference type (e.g., a class) by reference is quite different from passing it by value. To

understand the distinction, assume you have a simple Person class defined in a new Console Appli-

cation project named RefTypeValTypeParams, defined as follows:

class Person

{

public string personName;

public int personAge;

// Constructors.

public Person(string name, int age)

{

personName = name;

personAge = age;

}

public Person(){}

public void Display()

{

Console.WriteLine("Name: {0}, Age: {1}", personName, personAge);

}

}

Now, what if you create a method that allows the caller to send in the Person type by value

(note the lack of parameter modifiers):

C H A P T E R   4  

■

C O R E   C #   P R O G R A M M I N G   C O N S T R U C T S, PA RT   I I

133

8849CH04.qxd  10/1/07  10:31 AM  Page 133

---

static void SendAPersonByValue(Person p)

{