Passing ArrayList To A Class In Foreach Loop

I copy/pasted your samples, added a static variable to keep track of the instances of myclass, added outputs after the loop to show what the arraylist holds, and got this output which shows them to be distinct.  Maybe run this sample and tell me if I'm misunderstanding the problem.

-- run this somewhere
      ArrayList myClassArrayList = new ArrayList();
      myClassArrayList.Add( new myclass() );
      myClassArrayList.Add( new myclass() );
      foreach(myclass tempClass in myClassArrayList)
      {
        ArrayList bla = tempClass.GetArrayList();
        //play around with bla, get it how it should be for this instance
        //at this point bla is unique
        tempClass.SetArrayList(bla);
      }
      System.Diagnostics.Debug.WriteLine( "Instance 0 says: " + myClassArrayList[0].ToString() );
      System.Diagnostics.Debug.WriteLine( "Instance 1 says: " + myClassArrayList[1].ToString() );
---
  public class myclass
  {
    private ArrayList myClassesArrayList;
    static int iCounter = 0;

    public myclass()
    {
      myClassesArrayList = new ArrayList();
      myClassesArrayList.Add( iCounter );
      myClassesArrayList.Add( iCounter + 100 );
      iCounter++;
    }

    public void SetArrayList(ArrayList incoming)
    {
      this.myClassesArrayList = new ArrayList(incoming);
    }

    public ArrayList GetArrayList()
    {
      return myClassesArrayList;
    }

    public override string ToString()
    {
      return "I am instance " + ((int)myClassesArrayList[0]).ToString();
    }

  }