Sams Teach Yourself .Net in 21 Days
- Table of Contents
- Copyright
- About the Author
- About the Technical Editor
- Acknowledgments
- We Want to Hear from You
- Introduction
- Week 1: At a Glance
- Day 1. Introduction to the Microsoft .NET Framework
- Day 2. Introduction to Visual Studio .NET
- Day 3. Writing Windows Forms Applications
- Day 4. Deploying Windows Forms Applications
- Day 5. Writing ASP.NET Applications
- Day 6. Deploying ASP.NET Applications
- Day 7. Exceptions, Debugging, and Tracing
- Week 1. In Review
- Week 2: At a Glance
- Day 8. Core Language Concepts in Visual Basic .NET and C#
- Day 9. Using Namespaces in .NET
- Day 10. Accessing Data with ADO.NET
- Day 11. Understanding Visual Database Tools
- Day 12. Accessing XML in .NET
- Day 13. XML Web Services in .NET
- Day 14. Components and .NET
- Week 2. In Review
- Week 3: At a Glance
- Day 15. Writing International Applications
- Day 16. Using Macros in Visual Studio .NET
- Day 17. Automating Visual Studio .NET
- Day 18. Using Crystal Reports
- Day 19. Understanding Microsoft Application Center Test
- Day 20. Using Visual SourceSafe
- Day 21. Object Role Modeling with Visio
- Week 3. In Review
Day 7. Exceptions, Debugging, and Tracing
In the previous few days, you've written a lot of code that worked perfectly. I like to think that all my code is perfect, and at the end of these 21 days, the code that you write will be perfect, too. But for those unfortunate times when errors occur in your code, be they from invalid user input, logic errors, or system errors, you must know how to write your applications to handle errors gracefully. Even before errors occur, you need to understand how to use the tools in Visual Studio .NET to debug your applications to avoid errors altogether. Today, you
- Understand why errors occur in applications
- Learn about structured exception handling in .NET and how the common language runtime implements exceptions
- Use Try, Catch, and Finally blocks to avoid runtime errors
- Learn about the differences in features between C# and Visual Basic .NET when handling exceptions
- Learn how to use all the debugging features available in Visual Studio .NET for Windows Forms and ASP.NET applications
Why Errors Happen | Next Section

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