visual studio conditional compilation symbols separator

#Visual studio conditional compilation symbols separator code

The Option Compare statement does not affect expressions in #If and #ElseIf statements. Regardless of the outcome of any evaluation, all expressions are evaluated using Option Compare Binary.

#Visual studio conditional compilation symbols separator code

Code excluded during conditional compilation is completely omitted from the final executable file, so it has no effect on size or performance. It is also used to prevent debugging code from appearing in an executable file. However, the #If.Then.#Else directives evaluate what is compiled by the compiler, whereas the If.Then.Else statements evaluate conditions at run time.Ĭonditional compilation is typically used to compile the same program for different platforms. On the surface, the behavior of the #If.Then.#Else directives appears the same as that of the If.Then.Else statements. Visual Basic program lines or compiler directives that are compiled if the associated expression evaluates to True. Required for #If statement block, optional elsewhere. Any expression, consisting exclusively of one or more conditional compiler constants, literals, and operators, that evaluates to True or False. Required for #If and #ElseIf statements, optional elsewhere. The compiler will include trace or debug code in the executable.įor example, the following compiler instruction entered on the command line would include your tracing code in a compiled executable:įor Visual Basic: vbc -r:System.dll -d:TRACE=TRUE -d:DEBUG=FALSE MyApplication.vbįor C#: csc -r:System.dll -d:TRACE -d:DEBUG=FALSE MyApplication.Conditionally compiles selected blocks of Visual Basic code. Set a conditional compiler switch on the command line. To compile instrumented code using the command line Clear the check boxes for settings you want to disable. In C#, click the Build tab in the left pane of the property page, then select the check boxes for the compiler settings you want to enable. Select the check boxes for the compiler settings you want to enable. In Visual Basic, click the Compile tab in the left pane of the property page, then click the Advanced Compile Options button to display the Advanced Compiler Settings dialog box. Right-click the project node in Solution Explorer.Ĭhoose Properties from the shortcut menu. To change compile settings from the property pages dialog box #CONST (for Visual Basic) and #define (for C#) You can specify the compiler settings for your application in several ways: Some release builds for production deployment might contain neither most debugging builds contain both. Thus, there are four types of build: Debug, Trace, both, or neither. You can have either the Trace or Debug conditional attribute turned on for a build, or both, or neither. dll) if the Trace conditional attribute is false, the trace statements are not included. For example, if the conditional attribute for tracing is true, all trace statements are included within an assembly (a compiled.

If you do not enable the TRACE directive, all tracing code is ignored during compilation and is not included in the executable code that you will deploy.īoth the tracing and debugging methods have associated conditional attributes. This allows tracing code to be compiled into the release version of your application. However, to include tracing features in a deployed application, you must compile your instrumented applications with the TRACE compiler directive enabled. While you are debugging an application during development, both your tracing and debugging output go to the Output window in Visual Studio.