While there are many books on particular languages, there are very few that deal with all aspects of object-oriented programming languages. The Interpretation of Object-Oriented Programming Languages provides a comprehensive treatment of the main approaches to object-oriented languages, including class-based, prototype and actor languages. This revised and extended edition includes a completely new chapter on Microsoft's new C# language, a language specifically designed for modern, component-oriented, networked applications. The chapter covers all aspects of C# that relate to object-oriented programming. It now also includes a new appendix on BeCecil, a kernel language that can implement object-oriented constructs within a single framework.