[diagnostic]: WFO0002 Unsupported property value.

[Tanya-Solyanik]

Technology

Windows Forms

Languages that apply

• C#
• Visual Basic

Default Reporting Scope

Error

Rule ID

WFO0002

.editorConfig Setting ID

dotnet_dagnostics.WFO0002

Short Title

Unsupported property value

Description

This error will generate one of the following messages -
ArgumentException: Project property '{0}' cannot be set to '{1}'
ArgumentException: Project property '{0}' cannot be set to '{1}'. Reason: {2}.

It was first implemented n NET6 with the following feature - https://learn.microsoft.com/en-us/dotnet/desktop/winforms/whats-new/net60?view=netdesktop-6.0#new-application-bootstrap as WFAC002 and then renamed in NET9 to WFO0002

This error is raised when one of the following project properties is set to an invalid value in the project file:

<ApplicationVisualStyles>true</ApplicationVisualStyles>
<ApplicationUseCompatibleTextRendering>false</ApplicationUseCompatibleTextRendering>
<ApplicationHighDpiMode>SystemAware</ApplicationHighDpiMode>
<ApplicationDefaultFont>Microsoft Sans Serif, 8.25pt</ApplicationDefaultFont>

And the code generator fails to generate appropriate code-behind.

How to fix

Set a valid value or remove ApplicationConfiguration.Initialize. If this error is suppressed AplicationConfiguration code wouldn't be generated and application will not run

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Associated WorkItem - 402811