A list of namespaces, types and members that sandboxed solutions are prohibited from using. Once a namespace, type or member ...

A list of namespaces, types and members that sandboxed solutions are prohibited from using. Once a namespace, type or member is added to this exclusion list then all currently activated sandboxed solutions using the excluded item will be prohibited from running code in the sandbox.  Any deactivated, or newly uploaded, sandboxed solution using an excluded item will be prohibited from activating.