The following types are no longer available: The deprecated controls were previously removed from designer toolboxes but were still available to be used. Replacement controls that have better design and support were introduced in.
NET Core 3.1, various Windows Forms controls are no longer available. NET Core 3.1, some Windows Forms controls are no longer available. UseLegacyImages compatibility switch not supportedĪbout and SplashScreen templates are broken for Visual Basic UseLegac圜ontextMenuStripSourceControlValue compatibility switch not supported SerializableAttribute removed from some Windows Forms typesĪllowUpdateChildControlIndexForTabControls compatibility switch not supportedĭomainUpDown.UseLegacyScrolling compatibility switch not supportedĭoNotLoadLatestRichEditControl compatibility switch not supportedĭoNotSupportSelectAllShortcutInMultilineTextBox compatibility switch not supportedĭontSupportReentrantFilterMessage compatibility switch not supportedĮnableVisualStyleValidation compatibility switch not supported The following breaking changes are documented on this page: Breaking changeĬellFormatting event not raised if tooltip is shownĬontrol.DefaultFont changed to Segoe UI 9 pt NET Core (3.0 or later), this article applies to you. NET Framework or from a previous version of. If you're upgrading a Windows Forms app from. NET version in which they were introduced. This article lists breaking changes for Windows Forms by the.