# API Difference # API Difference standalone-3.1 vs standalone-5.0-preview4.

API listing follows standard diff formatting. Lines preceded by a '+' are
additions and a '-' indicates removal.

* [System.Drawing.Common](5.0-preview4-standalone-packages_System.Drawing.Common.md)
* [System.IO.FileSystem.AccessControl](5.0-preview4-standalone-packages_System.IO.FileSystem.AccessControl.md)
* [System.Security.Principal.Windows](5.0-preview4-standalone-packages_System.Security.Principal.Windows.md)
* [System.Threading.AccessControl](5.0-preview4-standalone-packages_System.Threading.AccessControl.md)

