C#

for (Iterator i = myList.iterator(); i.hasNext();)
{
   String tmp = (String) i.next();
}

foreach(String tmp in myList)
{
}

for (int i = 0; i < myList.size(); i++)
{
   String tmp = (String) myList.get(i);
}

for (int i = 0; i < 8; ++i)
{
    // You need to cast.
    Customer cust = (Customer)customers[i];
}

foreach (Customer cust in customers)
{
    // cust is now of correct type Customer.
} 

// Calling code somehow knows that customers[4] needs some special handling.
for (int i = 0; i < 8; ++i)
{
   if (i == 4)
   {
      Customer cust = (Customer)customers[i];
      DoSumthingWithCustomer(cust);
   }
}

// Calling code only knows it needs to call a method for each customer object.
foreach (Customer cust in customers)
{
    // cust is now of correct type Customer.
    cust.DoSumthing();
}

protected void DoSomething(MySortedStringList sortedElements, string[] buffer)
{
   int i = 0;
   foreach (string element in sortedElements)
   {
      buffer[i++] = element;
   }

}

public class MyForm: Form
{
   private Button button;

   public MyForm()
   {
      button = new Button();
      this.Controls.Add(button);

      AcceptButton = button;
   }
}

string[] values = text.Split(new char[]{'|'});<br />
StringBuilder result = new StringBuilders();<br />
for (int i=0; i<values.Length; i++)<br />
{<br />
   if (i > 0)<br />
   {<br />
      if (i == 3 || i == 5)<br />
         sb.Append(';');<br />
      else<br />
         sb.Append(',');<br />
   }<br />
<br />
   sb.Append(values[i]);<br />
}<br />
<br />
return sb.ToString();

class Base
{
    public int iNo;
}

class Class1
{
    public Base myBase;
}

class Class2
{
    public Base myBase;
}

class Test
{	
    [STAThread]
    static void Main()
    {
        Base b = new Base();
        b.iNo = 10;

        Class1 c1 = new Class1();
        c1.myBase = b;

        Class2 c2 = new Class2();
        c2.myBase = b;

        Console.WriteLine("c1.myBase.iNo = " + c1.myBase.iNo);
        Console.WriteLine("c2.myBase.iNo = " + c2.myBase.iNo);
        
        c2.myBase.iNo = 5;

        Console.WriteLine("c1.myBase.iNo = " + c1.myBase.iNo);
        Console.WriteLine("c2.myBase.iNo = " + c2.myBase.iNo);
    }
}