This article describes some of the new Windows Presentation Foundation features and enhancements in .NET 7.

Performance improvements

A lot of the improvements in WPF for .NET 7 were focused around performance, such as:

• Avoid boxing and unboxing where possible.
• Avoid unnecessary object allocations on the heap.
• Reuse instances ofStringBuilder instead of creating new instances.
• Stopped usingStringBuilder when it wasn't necessary.

For a list of notable changes, see.NET Blog - What’s new for WPF in .NET 7.

Accessibility improvements and fixes

Additional keyboard interactions for controls were added:

• TheDataGrid andGridView column widths can be adjusted withALT +Left/Right Arrow.
• When sorting is enabled for theDataGrid, a column can be sorted withF3.
• Checkable menu items are now correctly announced with an onscreen narrator.

Bug fixes

While WPF remains fully supported and serviced on .NET Framework, most fixes and all new features only go into .NET, where we have the opportunity to make bigger changes. The WPF community helped address some long-standing bugs in this release:

• FocusVisualStyle can’t be overwritten globally
• CommandParameter invalidates CanExecute
• .NET 6 Tooltip behavior change from .NET 5 (bug?)
• Comboboxitem tooltip bug
• ContextMenu stops working if its owner is removed from the visual tree
• Fixes rounding error while glyphrun serialization

There were more bug fixes provided by the community, many of which are noted on the.NET Blog.

See also

• .NET Blog - What’s new for WPF in .NET 7
• .NET Community Toolkit