Portable Class Library
Portable Class Library (PCL) is a set of platform independent APIs that can be referenced in more than one platform. They are a subset of the .NET Base Class Library (BCL).
.NET BCL is a library that contains the standards of the C# language. It provides types to represent the data types of the Common Language Interface, file access, custom attributes, security attributes, string manipulation, formatting, streams, and collections. It defines types in namespaces we might be familiar with (
In a PCL, we need to select a profile that ...