Sams Teach Yourself Visual Studio® .NET 2003 in 21 Days

Why Errors Happen

In the course of writing any type of computer program, three types of errors can crop up:

• Syntax errors

• Logic errors

• Runtime errors

Let's look at how these errors occur and how you can avoid them.

How to Avoid Syntax Errors

Syntax errors occur when you misspell a variable name, object name, or reference an object incorrectly. Syntax errors are the easiest errors to avoid, because Visual Studio .NET lets you know if a keyword or variable is misspelled. If you're coding in Visual Basic, you can set the Option Explicit option on in your Project Properties dialog box, which tells Visual Studio .NET to make sure that all variables you use in your code are declared before they are referenced. This feature isn't available in C#, but ...