Merge pull request #146 from flutos/207ce0bccceec3ff7860ea986086fedb5a92d822

fix for bug 708178 that would fail if the type wasnt IEnumerable, should check if it implement IEnumerable rather than is IEnumerable

diff --cc mcs/class/System.XML/Test/System.Xml.Serialization/XmlSerializerTestClasses.cs
Simple merge