This Hands-On Lab is available online!
System requirements and support options
Portable class libraries enable you to write and build managed assemblies that work on more than one Microsoft .NET Framework Platform. You can create classes that contain code you wish to share across many projects, such as shared business logic, and then reference those classes from different types of projects. In this lab, learn how to write code that works on more than one Framework Platform without recompilation using Portable Class Library projects.