Builds upon the basic principles learned in Object-Oriented Programming 1 (10-152-311), further exploring object-oriented concepts and C# .NET syntax, with a focus on file/data access and n-tier application design. Learners will create a variety of C# .NET Windows Presentation Foundation (WPF) applications which incorporate n-tier design principles and design patterns. Additional topics include collections, object initializers, XML, streams, serialization, encryption and LINQ.