C#

foreach (ListViewItem thisIsTheVariable in ListView.Items) {
   MessageBox.Show(thisIsTheVariable.Text);
}

foreach (ListViewItem item in ListView.Items)
{
    // ...
}

throw new ProgrammingQuestionInLoungeException();

Customer customer = null;
if(e.SomeObject is Customer)
    customer = (Customer)e.SomeObject;
else
    customer = null;

James Simpson wrote:

The () cast method is more effecient becuase as compiles down to a set of IL instructions that include checking the type before attempting the cast, or returning null, eg:

MyObject thing = new MyObject();

// 1. 
MyOtherObject otherThing = thing as MyOtherObject;

// 2.
MyOtherObject otherThing = (MyOtherObject) thing;