This file is the per-folder README for the SIPSorcery package's source
directory. The full project README -- the same one rendered on the
NuGet package page and on the repository home page -- lives at the
repo root and is what gets shipped inside the .nupkg. Read it there:
Why this file exists at all: GitHub renders a folder README inline when visitors browse a directory. Without this stub, the SIPSorcery folder would have no description and visitors who deep-linked here from nuget.org's Project website link would land on a bare file listing. The actual package documentation, install instructions, supported protocols, getting-started for VoIP, and getting-started for WebRTC are all in the root README to avoid duplication.