XML Commenting - ambiguous reference "NotifyCollectionChangedEventArgs" in see cref tag?

Basically, I have the following: <see cref="NotifyCollectionChangedEventArgs"/> see tag in my XML Comments. ReSharper states that it is an ambiguous reference and suggests for me to give it as an absolute path, so I use <see cref="System.Collections.Specialized.NotifyCollectionChangedEventArgs"/> instead and it still says that it is an ambiguous reference. I have no idea what could possibly be going on that there are 2 classes with the same name in the same namespace??

Anyone know why this is coming up as a problem with ReSharper? I haven't tested this against Sandcastle to see if it complains because 开发者_Go百科this machine doesn't have Sandcastle on it yet, but I do wonder if that'll complain as well.