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class  a{};
struct a{};
½á¹¹ÌåÒ²¿ÉÒÔÔÚÃû×ÖÇ°Ãæ¼ÓÈë¿ØÖÆ·ÃÎÊ·û.
public struct student{};
internal struct student{};
Èç¹û½á¹¹ÌåstudentûÓÐpublice»òÕßinternalµÄÉùÃ÷ Ààprogram¾ÍÎÞ·¨Ê¹ÓÃstudent½á¹¹¶¨Òå obj¶ÔÏó
Èç¹û½á¹¹ÌåstudentµÄÔªËØÃ»ÓÐpublicµÄÉùÃ÷£¬¶ÔÏóobj¾ÍÎÞ·¨µ÷ÓÃÔªËØx
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³ÌÐò:
using System;
public struct student
    {
       public int x;
    };
class program
{
    public static void Main()
    {
     student obj=new student();
     obj.x=100;      
    }
};
ÔڽṹÌåÖÐÒ²¿ÉÒÔ¶¨Ò徲̬³ÉÔ±ÓëÀàÖÐÒ»Ñù£¬Ê¹ÓÃʱ±ØÐëÓÃÀàÃû£¬»ò½á¹¹ÃûÀ´µ÷Óò»ÊôÓÚʵÀý,ÉùÃ÷ʱֱ½Ó¶¨Òå.
³ÌÐò:
using System;
public struct student
    {
     public static int a = 10;
    };
class exe
{
 public static void Main()
    {
     Console.WriteLine( student.a = 100);
    }
};
»ò
using System;
class base
{
public struct student
    {
     public static int a = 10;
    };
}
class exe
{
 public static void Main()
    {
     Console.WriteLine( base.student.a = 100);
    }
};
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public struct student
    {
       public int x;
       public int y;
       public static int z;
       public student(int a,int b,int c)
        {
            x=a;
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
namespace ConsoleApplication1
{
class Program
{
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{
get
{
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}
set
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}
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using System;
using System.Data;
using System.Data.OleDb;
namespace AccessDb
{
/**//// <summary>
/// AccessDb µÄժҪ˵Ã÷£¬ÒÔÏÂÐÅÏ¢ÇëÍêÕû±£Áô
/// ÇëÔÚÊý¾Ý´«µÝÍê±Ïºóµ÷ÓÃClose()·½·¨£¬¹Ø±ÕÊý¾ÝÁ´½Ó¡£
/// </summary>
public class AccessDbClass
{
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