Course 70093: Methods, Exceptions, and File I/O

Introduction This course introduces methods and describes how to define and use them in object-oriented languages such as C#. Methods enable you to divide your solutions into logical components that can even be reused in other applications. Methods may require exceptions to be used to indicate an error condition to the code that calls your methods. An understanding of exception handling can help you develop error-free applications. The ability to access and manipulate the files on the file system is a common requirement for many applications. An understanding of how to read and write to files by using the classes in Microsoft® .NET Framework is important for developing applications that can access and manipulate data stored outside of the applications. Objectives At the end of the course, students will be able to:

• In this course, you will declare and invoke methods. In addition, you will handle exceptions and read and write files.

Modules & Lessons Declaring and Calling Methods Module Introduction Defining and Invoking Methods Specifying Optional Parameters and Output Parameters Module Lab Module Follow Up Handling Exceptions Module Introduction Handling Exceptions Raising Exceptions Module Lab Module Follow Up Reading and Writing Files Module Introduction Accessing the File System Reading and Writing Files by Using Streams Module Lab Module Follow Up System Requirements To view this course, you need:

• Browser Microsoft Internet Explorer 7 (or higher)
• Browser Mozilla Firefox 2 (or higher)
• Browser Apple Safari 2 (or higher)
• Operating System Apple Mac OS X 10.4 (or higher)
• Processor Pentium III 1 GHz (or better)
• Processor Macintosh Intel-based or PowerPC G4 (or better)
• RAM 512 MB (1 GB or more recommended)
• Internet connection 256K (broadband recommended)
• Adobe Flash Player 8 (current version recommended)
• Adobe Reader 7 (or higher)
• Operating System Microsoft Windows 2000, XP, Vista, or Windows 7

For courses containing Virtual Server-based labs (courses in the IT Professional and Developer Catalog), you will need:

• Microsoft Virtual Server ActiveX control (1MB disk space needed to install)

Test your computer's capabilities to see if it supports this course. Accessibility Requirements The following software must be running on your computer in order to access this course with Screen Reader Software:

• Microsoft Internet Explorer 6.0 or higher
• Window-Eyes from GW Micro
• JAWS from Freedom Scientific
• MSAA enabled