using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestVar
{
class Program
{
static void Main(string[] args)
{
//定义int数组
int[] intAry = new int[] { 1, 2, 3, 4, 5, 6 };

//var varSet = intAry.Where(x => x > 3);
//执行Linq查询
var varSet = from i in intAry where i > 3 select i;

//遍历查询结果
foreach (var v in varSet)
{
Console.WriteLine(v);
}

//输出varSet的类型名称与命名空间
Console.WriteLine(varSet.GetType().Name);
Console.WriteLine(varSet.GetType().Namespace);

Console.ReadKey();
}
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestVar
{
class AutoProperty
{
public string Name { get; private set; }

public AutoProperty() { }
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestVar
{
public static class Extend
{
//第一个参数指定对String类型进行扩展
public static string ReplaceA(this string str, string destStr)
{
//将大写字母A转换为指定字串
return str.Replace("A", destStr);
}
}
}

class ClassA
{
public int X { get; set; }
public int Y { get; set; }

public ClassA(int x)
{
X = x;
}
}

static void Main(string[] args)
{
//普通类对象初始化，使用对象初始化器为Y赋值
ClassA a = new ClassA(1) { Y = 2 };

//集合的初始化
List<Point> points = new List<Point>
{
new Point { X = 2, Y = 2 },
new Point { X = 3, Y = 3 },
};

Console.ReadKey();
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestVar
{
class Program
{
static void Main(string[] args)
{
//定义两个匿名类型对象，属性名称、值均相同
var firstCar = new { Color = "Red", Name = "BMW" };
var secondCar = new { Color = "Red", Name = "BMW" };

//Object.Equals方法比较两个匿名类型对象是否相等
Console.WriteLine(firstCar.Equals(secondCar));
//使用==操作符比较两个匿名类型对象是否相等
Console.WriteLine(firstCar == secondCar);
//比较两个匿名类型是否同一类型
Console.WriteLine(firstCar.GetType().Name == secondCar.GetType().Name);

Console.ReadKey();
}
}
}