в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:19:19Z

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==Passing ref-types by value==

<source lang="csharp">using System;
class Person
{
public string fullName;
public int age;
public Person(string n, int a)
{
fullName = n;
age = a;
}
public void PrintInfo()
{
Console.WriteLine("{0} is {1} years old", fullName, age);
}
}
class MainClass
{
public static void SendAPersonByValue(Person p)
{
p.age = 99;
p = new Person("TOM", 999);
}
public static void Main()
{
Person fred = new Person("Fred", 12);
fred.PrintInfo();
SendAPersonByValue(fred);
fred.PrintInfo();
}
}</source>
<pre class=codeResult>Fred is 12 years old
Fred is 99 years old</pre>

==Value types are passed by value==

<source lang="csharp">using System;

class Test {
/* This method causes no change to the arguments used in the call. */
public void noChange(int i, int j) {
i = i + j;
j = -j;
}
}

class MainClass {
public static void Main() {
Test ob = new Test();

int a = 15, b = 20;

Console.WriteLine("a and b before call: " +
a + " " + b);

ob.noChange(a, b);

Console.WriteLine("a and b after call: " +
a + " " + b);
}
}</source>
<pre class=codeResult>a and b before call: 15 20
a and b after call: 15 20</pre>

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в 15:31, 26 мая 2010

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