c# foreach dictionary

foreach (KeyValuePair item in myDictionary)
{
    MessageBox.Show(item.Key + "   " + item.Value);
}

foreach(KeyValuePair<string, string> entry in myDictionary)
{
    // do something with entry.Value or entry.Key
}

foreach(var item in myDictionary)
{
  foo(item.Key);
  bar(item.Value);
}