Versioning of .NET Standard

Unlike PCL, each version of .NET Standard is linearly versioned and contains the APIs for the previous versions and so on. Once the version is shipped, it is frozen and cannot be changed, and the application can easily target that version.

The following diagram is a representation of how .NET Standard is versioned. The higher the version is, the more APIs will be available, whereas the lower the version is, the more platforms will be available: