class Program
{
  static void Main(string[] args)
  {
    thisClass testObj = new thisClass();
    Console.ReadLine();
  }
}
class thisClass
{
  private string A { get; set; }
  public thisClass()
  {
    /*当前类this 访问类中属性A 静态方法无法访问A属性*/
    this.A = "Test String";
    Console.WriteLine(this.TestFun("TestFun :"));
  }
  private string TestFun(string args)
  {
    return args + this.A;
  }
}

class Program
{
  static void Main(string[] args)
  {
    indexClass intIndexClass = new indexClass();
    intIndexClass[0] = new thisClass("intIndexClass 111");
    intIndexClass[1] = new thisClass("intIndexClass 222");
    indexClass stringIndexClass = new indexClass();
    stringIndexClass["string1"] = new thisClass("stringIndexClass string1");
    stringIndexClass["string2"] = new thisClass("stringIndexClass string2");
    Console.ReadLine();
  }
}
class indexClass
{
  /*声明属性*/
  private thisClass[] thisClassArr = new thisClass[10];
  private Hashtable thisClassStrArr = new Hashtable();
  /*创建索引器1 索引可以被重载，属于实例成员，不能声明为static*/
  public thisClass this[int index]
  {
    get { return thisClassArr[index]; }
    set { this.thisClassArr[index] = value; }
  }
  /*创建索引器2*/
  public thisClass this[string index]
  {
    get
    {
      return thisClassStrArr[index] as thisClass;
    }
    set { this.thisClassStrArr[index] = value; }
  }
}
class thisClass
{
  private string A { get; set; }
  public thisClass(string str)
  {
    /*当前类this 访问类中属性A 静态方法无法访问A属性*/
    this.A = str;
    Console.WriteLine(this.TestFun("TestFun :"));
  }
  private string TestFun(string args)
  {
    return args + this.A;
  }
}