[Breaking change]: ImageList.ColorDepth default changed to 32bit. #33402
Description
Description
The default value for ImageList.ColorDepth has been changed over time, starting with Depth4Bit, then moving to Depth8bit, and now in .NET 8.0, the default is being set to Depth32bit. This change affects both existing and new applications that target .NET 8.0. Existing applications may need to update their designer generated source code to reflect this change and replace ImageList.ColorDepth with the new default value (WinForms designer will do this automatically if opened in Visual Studio). We need to update out existing documentation on this property to reflect this change.
Version
.NET 8 Preview 1
Previous behavior
Default value was Depth8bit
New behavior
Default is Depth32bit
Type of breaking change
- Binary incompatible: Existing binaries may encounter a breaking change in behavior, such as failure to load or execute, and if so, require recompilation.
- Source incompatible: When recompiled using the new SDK or component or to target the new runtime, existing source code may require source changes to compile successfully.
- Behavioral change: Existing binaries may behave differently at run time.
Reason for change
NA
Recommended action
NA
Feature area
Windows Forms
Affected APIs
No response