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Conditional Compilation (Visual Basic) 

In conditional compilation, particular blocks of code in a program are compiled selectively while others are ignored.

In This Section

Conditional Compilation Overview

Explains what conditional compilation is used for, and discusses the #Const and #If...Then...#Else directives.

How to: Declare Conditional Compilation Constants

Shows how to declare conditional compilation constants in the Property Pages dialog box, at the command line, or in your code.

How to: Collapse and Hide Sections of Code

Explains how to specify a block of code that you can expand or collapse using the Visual Studio outlining feature.

Related Sections

Program Structure and Code Conventions

Provides suggestions for making your code easy to read and maintain.

Compiling to MSIL

Explains how your source code is translated into Microsoft intermediate language (MSIL) by the compiler.

Compiling MSIL to Native Code

Provides an overview of the .NET Framework JIT (just-in-time) compiler that converts MSIL to native (CPU-specific) code.