C# 程序开始主要是写类和方法 的基本步骤和调用方法

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

namespace demo学习控制
{
class Program
{

static void Main(string[] args)
{
Stuiden adsme = new Stuiden();
adsme.Bireday = Convert.ToDateTime("1983-02-03");
Console.WriteLine("我的年龄是:" + adsme.age + "  " + "测试的结果完成了。");
Console.ReadKey();

//Console.Write("{0}*{1}", (1 == 2 ? 3 : 4) / 2, "10");
Console.ReadKey();

}

}
}

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

namespace demo学习控制
{
class Stuiden
{
private DateTime bireday;

public DateTime Bireday
{
get { return bireday; }
set { bireday = value; }
}
public int age
{
get { return DateTime.Now.Year - bireday.Year; }
}

}
}

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

namespace demo学习类的方法
{
class Program
{
static void Main(string[] args)
{

Class1 ads = new Class1();
Console.WriteLine("请输入您的名字");
ads.Usname1 = Console.ReadLine();
try
{
Console.WriteLine("请输入您的年龄");
ads.Age1 = Convert.ToInt32(Console.ReadLine());

}
catch
{
Console.WriteLine("您输入的信息有误，请重新输入");
return;
}
string info = ads.Getinfots();
//Console.WriteLine(info);
//Console.WriteLine(Uname);
Console.ReadKey();

}
}
}

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

namespace demo学习类的方法
{

class Class1
{

private string Usname;

public string Usname1
{
get { return Usname; }
set { Usname = value; }
}
private int Age;

public int Age1
{
get { return DateTime.Now.Year - Age; }

}
public string Getinfots()
{

string info = string.Format("我的名字:{0},我的年龄：{1}", Usname, Age);
return info;
}
}
}