The default build process added a custom attribute that details the version of Smart Assembly that performed the obfuscation.
The attribute is:
and the value will be SmartAssembly<major version number>
This information is potentially undesirable to disclose due to aiding reverse engineering efforts and can be prevented from being applied. To do so please add the following parameter to your SmartAssembly project file (*.saproj) in the "Options" section.