Progress.IO.BinarySerializer provides functionality to serialize and deserialize ABL class-based objects in binary format. The serialization and deserialization are performed in conjunction with classes that inherit from Progress.IO.InputStream and Progress.IO.OutputStream. Progress.IO.BinarySerializer formats the data, and the stream classes determine where the data comes from and goes to. For example, Progress.IO.FilleInputStream and Progress.IO.FileOutputStream are used for serialization to and deserialization from a file.