using System;
using System.Windows.Forms;
class WinFormApp : Form
{
WinFormApp()
{
Text = "Hello World!";
}
public static void Main()
{
Application.Run(new WinFormApp());
}
}
실행결과
자료형
using System;
class PrimitiveTypeApp
{
public static void Main()
{
bool b;
int i = int.MaxValue;
uint j = uint.MaxValue;
double d = double.MaxValue;
b = (i != 0);
Console.WriteLine("boolean b = " + b);
Console.WriteLine("Max value of signed integer = " + i);
Console.WriteLine("Max value of unsigned integer = " + j);
Console.WriteLine("Max value of double = " + d);
}
}
실행결과
boolean b = True
Max value of signed integer = 2147483647
Max value of unsigned integer = 4294967295
Max value of double = 1.79769313486232E+308
스트링
using System;
class StringApp
{
public static void Main()
{
string s = "Hello";
s += " World";
Console.WriteLine(s + "!");
}
}
실행결과 : Hello World!
프로퍼티
using System;
class PropertyClass
{
private int privateValue;
public int PrivateValue
{
get
{
return privateValue;
}
set
{
privateValue = value;
}
}
public void PrintValue()
{
Console.WriteLine("Hidden Value = " + privateValue);
}
}
class PropertyApp
{
public static void Main()
{
int n;
PropertyClass obj = new PropertyClass();
obj.PrivateValue = 100;
obj.PrintValue();
n = obj.PrivateValue;
Console.WriteLine(" Value = " + n);
}
}
실행결과
Hidden Value = 100
Value = 100
연산자 중복
using System;
class Even
{
int evenNumber;
public Even(int n) // 생성자
{
evenNumber = (n % 2 == 0) ? n : n+1;
}
public static Even operator++(Even e) // ++연산자
{
e.evenNumber += 2; // 다음 짝수
return e;
}
public static Even operator--(Even e)
{
e.evenNumber -= 2;
return e;
}
public void PrintEven()
{
Console.WriteLine("Even Number = " + evenNumber);
}
}
class OperatorOverloadingApp
{
public static void Main()
{
Even e = new Even(4);
e.PrintEven();
++e;
e.PrintEven();
--e;
e.PrintEven();
}
}
실행결과
Even Number = 4
Even Number = 6
Even Number = 4
델리게이트
using System;
delegate void SampleDelegate(); // 델리게이트 정의
class DelegateClass
{
public void DelegateMethod()
{
Console.WriteLine("In the DelegateClass.DelegateMethod...");
}
}
class DelegateApp
{
public static void Main()
{
DelegateClass obj = new DelegateClass();
SampleDelegate sd = new SampleDelegate(obj.DelegateMethod);
sd(); // invoke obj.DelegateMethod() indirectly.
}
}
실행결과 : In the DelegateClass.DelegateMethod...
이벤트
using System;
using System.Windows.Forms;
class EvenApp : Form
{
public EvenApp() // 생성자
{
this.Click += new EventHandler(ClickEvent); // 이벤트 처리기 등록
}
void ClickEvent(object sender, EventArgs e) // 이벤트 처리기 작성
{
MessageBox.Show("Hello world!");
}
public static void Main()
{
Application.Run(new EvenApp());
}
}
실행결과
스레드
using System;
using System.Threading; // 반드시 포함!
class ThreadApp
{
static void ThreadBody() // 스레드 몸체
{
Console.WriteLine("In the thread body...");
}
public static void Main()
{
ThreadStart ts = new ThreadStart(ThreadBody);
Thread t = new Thread(ts);
Console.WriteLine("*** Start of Main");
t.Start();
Console.WriteLine("*** End of Main");
}
}
실행결과
*** Start of Main
*** End of Main
In the thread body...
