I'm thinking of changing the namespaces around to more closely match to the functionality it relates to. So, the IEnumerableOfTExtensions class would move from:
 
Spackle.Extensions
 
to
 
Spackle.System.Collections.Generic
 
SecureRandom would move to Spackle.System.Random. ScopeSwitcher isn't really focused on any specific namespace, so it would remain in Spackle.
 
I'm not sure if this is a good idea or not. Just throwing it out to review in more detail before I release a 1.0 version.