Compiler Warning WFDEV006

Version introduced: .NET 10 Preview 1

ContextMenu, DataGrid, MainMenu, Menu, StatusBar, ToolBar are obsolete. They're provided for binary compatibility with .NET Framework.

Starting with .NET 10, some controls are provided for binary compatibility with .NET Framework, but they're marked as obsolete and aren't intended to be used directly from your code. They can't be instantiated. Referencing one of the following controls generates warning WFDEV006 at compile time:

• ContextMenu
• DataGrid
• MainMenu
• Menu
• StatusBar
• ToolBar

In prior versions of .NET, referencing a .NET Framework library that used these types would result in an exception being thrown because .NET didn't provide these types. Starting with .NET 10, these types exist to improve compatibility with older .NET Framework libraries that can't be upgraded.

Workaround

Replace references to these controls with their newer counterparts:

Suppress a warning

If you must reference the obsolete APIs, for example to run reflection on them, you can suppress the warning in code or in your project file. However, these types can't be instantiated and are only provided for compatibility.

Suppress the warning with either of the following methods:

• Set the severity of the rule in the .editorConfig file.

  [*.{cs,vb}]
  dotnet_diagnostic.WFDEV006.severity = none
  

  For more information about editor config files, see Configuration files for code analysis rules.

• Add the following PropertyGroup to your project file:

  <PropertyGroup>
      <NoWarn>$(NoWarn);WFDEV006</NoWarn>
  </PropertyGroup>
  

• Suppress in code with the #pragma warning disable WFDEV006 directive.

For more information, see How to suppress code analysis warnings.