optioninfer.md

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/optioninfer	2015-07-20	.net			devlang-visual-basic	article	/optioninfer	VB	-optioninfer compiler option [Visual Basic] /optioninfer compiler option [Visual Basic] optioninfer compiler option [Visual Basic]	f6c09db1-0553-464a-abe3-d4510c61d6ed	19	dotnet-bot	dotnetcontent	cs-cz de-de es-es fr-fr it-it ja-jp ko-kr pl-pl pt-br ru-ru tr-tr zh-cn zh-tw

/optioninfer

Enables the use of local type inference in variable declarations.

Syntax

/optioninfer[+ | -]  

Arguments

Term	Definition
+ | -	Optional. Specify /optioninfer+ to enable local type inference, or /optioninfer- to block it. The /optioninfer option, with no value specified, is the same as /optioninfer+. The default value when the /optioninfer switch is not present is also /optioninfer+. The default value is set in the Vbc.rsp response file.

[!NOTE] You can use the /noconfig option to retain the compiler's internal defaults instead of those specified in vbc.rsp. The compiler default for this option is /optioninfer-.

Remarks

If the source code file contains an Option Infer Statement, the statement overrides the /optioninfer command-line compiler setting.

To set /optioninfer in the Visual Studio IDE

1. Select a project in Solution Explorer. On the Project menu, click Properties. For more information, see NIB: Managing Project Properties with the Project Designer.

2. On the Compile tab, modify the value in the Option infer box.

Example

The following code compiles test.vb with local type inference enabled.

vbc /optioninfer+ test.vb  

See Also

Visual Basic Command-Line Compiler
/optioncompare
/optionexplicit
/optionstrict
Sample Compilation Command Lines
Option Infer Statement
Local Type Inference
Visual Basic Defaults, Projects, Options Dialog Box
Compile Page, Project Designer (Visual Basic)
/noconfig
Building from the Command Line