New Features in C# 2.0—Enumerate Using Generic Iterators

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Enumerate Using Generic Iterators

In the previous examples you could not iterate over your list of Pilgrims using a foreach loop. As such, if you try to use the following code in Example 1-3:

foreach ( Pilgrim p in pilgrims )
{
  Console.WriteLine("The pilgrim's name is " 
    + p.ToString( ));
}

you will receive the following error:

Error 1 foreach statement cannot operate on variables of type
'ImplementingGenericInterfaces.LinkedList <ImplementingGenericInterfaces. Pilgrim>' because 'ImplementingGenericInterfaces.LinkedList
<ImplementingGenericInterfaces.Pilgrim>' does not contain a public definition for 'GetEnumerator'

In earlier versions of C#, implementing GetEnumerator was somewhat complicated and always tedious, but in C# 2.0 it is greatly simplified.