ArrayList and your own object : ArrayList object : Data Structure C# Examples

    
using  System;
using  System.Collections;

class  Employee  :  IComparable
{
    public  string  Name;
    public  int  Number;

    public  Employee(string  Name,  int  Number)
    {
        this.Name  =  Name;
        this.Number  =  Number;
    }

    public  override  string  ToString()
    {
        return  "Name  is  "  +  Name  +  ",  Number  is  "  +  Number;
    }

    public  int  Compare(object  lhs,  object  rhs)
    {
        Employee  lhsEmployee  =  (Employee)  lhs;
        Employee  rhsEmployee  =  (Employee)  rhs;
        if  (lhsEmployee.Number  <  rhsEmployee.Number)  {
            return  -1;
        }  else  if  (lhsEmployee.Number  >  rhsEmployee.Number)  {
            return  1;
        }  else  {
            return  0;
        }
    }

    public  int  CompareTo(object  rhs)  {
        return  Compare(this,  rhs);
    }
}


class  MainClass
{
    public  static  void  DisplayArrayList(string  arrayListName,  ArrayList  myArrayList)  {
        for  (int  i  =  0;  i  <  myArrayList.Count;  i++)  {
            Console.WriteLine(arrayListName  +  "["  +  i  +  "]  =  "  +  myArrayList[i]);
        }
    }

    public  static  void  Main()
    {
        ArrayList  myArrayList  =  new  ArrayList();

        //  add  four  Employee  objects  to  myArrayList  using  the  Add()  method
        Console.WriteLine("Adding  four  Employee  objects  to  myArrayList");
        Employee  myM  =  new  Employee("M",  2001);
        Employee  myB  =  new  Employee("B",  2001);
        Employee  myC  =  new  Employee("C",  1999);
        Employee  myT  =  new  Employee("T",  1979);
        myArrayList.Add(myM);
        myArrayList.Add(myB);
        myArrayList.Add(myC);
        myArrayList.Add(myT);
        DisplayArrayList("myArrayList",  myArrayList);

        if  (myArrayList.Contains(myB))
        {
            Console.WriteLine("myArrayList  does  contain  myB");
            int  index  =  myArrayList.IndexOf(myB);
            Console.WriteLine("myB  occurs  at  index  "  +  index);
        }
    }
}