PhysFS.NET is a library that encapsulates the PhysFS API into a .NET assembly. There are two class objects that are exposed in the assembly: PhysFS.cs This class exposes any non-filehandle specific functionality contained in the PhysFS library. PhysFSFileStream.cs A System.IO.Stream derived class which provides file access via the PhysFS API. Usage of this object is identical to a standard stream object.