using System;
using System.Collections.Generic;

public class Program
{
	
	public static void Main()
	{
		Dictionary<string, string> dictionary = new Dictionary<string, string>( ); // 建立字典key:string,value:string
		dictionary.Add("LastName","Lin");
		dictionary.Add("FirstName","Yu-Hsiang");
			
		// 從字典中取出對應值
		Console.WriteLine("FirstName:" + dictionary["FirstName"]);
		Console.WriteLine("LastName:" + dictionary["LastName"]);
		
		// 遍歷字典
		foreach ( var item in dictionary )
		{
			Console.WriteLine( "Key = " + item.Key + ", Value = " + item.Value );
		}
	}
}

FirstName:Yu-Hsiang
LastName:Lin
Key = LastName, Value = Lin
Key = FirstName, Value = Yu-Hsiang

using System;
					
public class Program
{
	public class Person{
		
		private string name; // 內部私有的name變數
		
		public string Name {
			get{return name;} // getter 取出私有的name變數
			set{this.name = value;} // setter 將value設定到私有的name變數
		}
		
		public Person(){ // 建構子
			this.name = "沒有名子";
		}
		
		public Person(string name){ // 多載(Overload)的建構子，可初始化name
			this.name = name;
		}
	
	}
	
	public static void Main()
	{
		Person person= new Person();// 宣告一個人的實例
		Console.WriteLine(person.Name);// 透過getter取出變數
		person.Name = "Yu Hsiang"; // 透過setter設定變數
		Console.WriteLine(person.Name); // 透過getter取出變數
	}
}

沒有名子
Yu Hsiang

using System;

public class Program
{
	public static void Main()
	{
		Random r = new Random(); //宣告亂數種子
		int result = r.Next(1,7); // 可能回傳1~6的整數數字，因為Next第二個參數是小於，以此例為小於7
		Console.WriteLine(result); // 可能回傳1~6的整數數字
	}
}

2

using System;

public class Program
{
	public static void Main()
	{
		Random r = new Random(); //宣告亂數種子	
		
		int [] array = new int[5]{1,2,3,4,5}; // 宣告陣列並初始化
		
		for(int i=0;i<array.Length;i++){
			int index1 = r.Next(0,array.Length); 
			int index2 = r.Next(0,array.Length); 
			if(index1 != index2){ // 交換陣列內容
				int temp = array[index1];
				array[index1] = array[index2];
				array[index2] = temp;
			}
		}
		Console.WriteLine("陣列洗牌後結果:");
		foreach(int item in array){
			Console.WriteLine(item);
		}
	}
}

陣列洗牌後結果:
2
4
1
3
5

using System;
using System.Collections;

public class Program
{
	public static void Main()
	{
		Queue q = new Queue();
		q.Enqueue("hello"); // 向 Queue 的末尾新增一個物件。
		q.Enqueue(32);
		q.Enqueue(5);
		q.Enqueue('N');
		
		Console.WriteLine("印出Queue的內容:");
		foreach(var item in q){
			Console.WriteLine(item);
		}
		
		Console.WriteLine("取出一個資料:");
		var result = q.Dequeue(); // 從 Queue 的前端取出一個資料
		Console.WriteLine(result);
        
		Console.WriteLine("轉成陣列印出:");
		var array = q.ToArray();
		foreach(var item in array){
			Console.WriteLine(item);
		}
	}
}

印出Queue的內容:
hello
32
5
N
取出一個資料:
hello
轉成陣列印出:
32
5
N

using System;
using System.Collections;

public class Program
{
	public static void Main()
	{
		Stack s = new Stack();
		s.Push("hello"); // 向 Stack 的頂部新增一個物件。
		s.Push(32);
		s.Push(5);
		s.Push('N');
		
		Console.WriteLine("印出Stack的內容:");
		foreach(var item in s){
			Console.WriteLine(item);
		}
		
		Console.WriteLine("取出一個資料:");
		var result = s.Pop(); // 移除並返回在 Stack 的頂部的物件。
		Console.WriteLine(result);
		
		Console.WriteLine("Peek觀察頂部物件但不移除:");
		result = s.Peek(); // Peek觀察頂部物件但不移除
		Console.WriteLine(result);
		
		Console.WriteLine("轉成陣列印出:");
		var array = s.ToArray();
		foreach(var item in array){
			Console.WriteLine(item);
		}
	}
}

印出Stack的內容:
N
5
32
hello
取出一個資料:
N
Peek觀察頂部物件但不移除:
5
轉成陣列印出:
5
32
hello

var timeoutID = setTimeout(function[, delay, arg1, arg2, ...]);
var timeoutID = setTimeout(function[, delay]);
var timeoutID = setTimeout(code[, delay]);

const timeroutID = window.setTimeout((()=>{console.log('Hello world')}),1000);

const timeroutID = window.setTimeout((()=>{console.log('Hello world')}),1000);
window.clearTimeout(timeroutID);

var intervalID = setInterval(func, [delay, arg1, arg2, ...]);
var intervalID = setInterval(function[, delay]);
var intervalID = setInterval(code, [delay]);

const intervalID = window.setInterval((()=>{console.log('Hello world')}),1000);

const intervalID = window.setInterval((()=>{console.log('Hello world')}),1000);
window.clearInterval(intervalID);

int [] array = new int[5];
Console.WriteLine(array[0]); // 輸出:0  陣列的元素會初始化為整數的元素類型預設值 0 。

int [,] array = new int[4,2];
Console.WriteLine(array[1,1]); // // 輸出:0  陣列的元素會初始化為整數的元素類型預設值 0 。

int [] array = new int[]{1,2,3,4,5};
Console.WriteLine(array[0]); // 輸出:1 

int [,] array = new int[4,2]{{1,2},{3,4},{7,5},{4,8}}; // 在宣告時如果有初始值後面就必須要填滿那些範圍的元素
Console.WriteLine(array[2,1]); // 輸出5 

int[][] array = new int[3][]; // 宣告時必須int[][] 而不是 int[,]
array[0] = new int[]{1,3};
array[1] = new int[]{5,3,3};
array[2] = new int[]{1,31,5};
Console.Write(array[2][1]);//輸出 31

var array = new [] {"hi!",null,"world"};
Console.Write(array[2]);//輸出 world

int [] array = new int[]{1,2,3,4,5};
for(int i=0;i<array.Length;i++){
	Console.Write(array[i]); 
}  // 輸出:12345

int [] array = new int[]{1,2,3,4,5};
foreach(int num in array){
    Console.Write(num);
} // 輸出:12345

using System;			
public class Program
{
	public static void printArray(int [] arr){
		for(int i=0;i<arr.Length;i++){
			Console.Write(arr[i]);
		}
	}
	public static void Main()
	{
		int [] array = new int[]{1,2,3,4,5};
		printArray(array); // 輸出12345
	}
}