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GetEnumerator() cil managed

{

...

newobj instance void

CustomEnumeratorWithYield.Garage/'d__0'::.ctor(int32)

...

} // end of method Garage::GetEnumerator

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8849CH09.qxd  10/1/07  10:41 AM  Page 294

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So, to wrap up our look at building enumerable objects, remember that in order for your

custom types to work with the C# foreach keyword, the container must define a method named

GetEnumerator(), which has been formalized by the IEnumerable interface type. The implementa-

tion of this method is typically achieved by simply delegating it to the internal member that is

holding onto the subobjects; however, it is also possible to make use of the yield return syntax to

provide multiple “named iterator” methods.