What’s new for WPF in .NET 7

Pankaj Chaurasia

Fiza Azmi

Ashish Kumar Singh

WPF community is filled with so many passionate individuals with truly amazing experiences and this post aims to highlight what has been done in the dotnet/wpf repo in past few months and thanking the amazing people behind all this. We are really grateful for the contributors who have consistently worked towards improving WPF. Here is a quick recap of what was accomplished in the past few months in the dotnet/wpf repository.


WPF in .NET 7 ships with number of improvements in the areas not just limited to unnecessary boxing/unboxing, use of Span for string manipulation, better allocation/deallocation of objects, memory improvements, font rendering etc. but also code cleanup and making way for future readiness.


Boxing and Unboxing are computationally expensive processes. When a value type is boxed, a new object must be allocated and constructed. To a lesser degree, the cast required for unboxing is also expensive computationally.


The more objects allocated on the heap, more is GC overhead in reclaiming those object post their lifetimes. Reducing such allocations in memory lowers GC overhead.


Special thanks to Stephen Toub for contributing many other performance fixes.


With a commitment to ensure WPF controls are accessible, below are the product improvements that made its way to WPF.

Bug fixes

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

The above list is NOT exhaustive and many more bug fixes went thanks to our community contributors for their efforts in fixing them.

Infrastructure upgrades

One of the major areas for improvement voiced by community is the rate at which community contributions were accepted. With the below infrastructure upgrades, we intend to address the rate at which we accept community contributions.

Title Description
Test repository migration WPF codebase has more than 30K integration tests. These tests ensure sanity of the build with various OS and .NET framework combination matrix. As part of open sourcing the test infrastructure, we aim at moving all the tests from internal to Github. This would also enable community to add their own tests to the test repo.

We have open-sourced most of the basic regression tests that enables the community contributors to run those tests locally and debug them, in case there’s an issue with any of the PR submissions .

Running basic tests on each incoming PR Basic regression tests, (aka Daily Regression Tests or DRT(s)) that validates the basic behavior of controls, need to be run on each submitted PR to ensure that the changes do not cause any regressions. The end goal of this exercise is to make sure that we have a framework in place that allows running tests on incoming PRs. This would reduce the turn-around times on PRs, thereby increasing the velocity at which new changes / fixes can be merged into the repository.

We are now running these tests as a part of build on every incoming PR. In upcoming months, we plan to enhance these pipelines in terms of the reporting the status if test execution, to avoid manual lookup in logs for failures.

Ongoing activities

  • Tests repository migration still has a larger subset of tests that are yet to be ported.
  • Enabling running the bigger suite of test cases on community submitted PRs which would improve the turnaround time for feedback on PRs.
  • Clearing the backlog of PRs and issues.


The community run-project started with the intent to enable developers in making big difference in shaping WPF going forward. To all the WPF developers, your work is invaluable. We’d like to thank the below contributors for their efforts in fixing long standing issues and contributing performance and functional improvements.


We’d encourage you to try out WPF on .NET 7 and let us know how these improvements have helped. We are always looking for feedback on how to improve the product and look forward to your contributions. We would like to thank everyone that is committed to making WPF better as a product. Our goal is to continue improving WPF, while growing our community so that we can bring you the best developer experience possible. Your help and input is very much required. Whether that is through triaging issues, updating documentation, participating in discussions or writing code, we appreciate all of your help!


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  • Mark Richards 14

    Very happy to see WPF get some love for the .NET 7 release.

    • wei wei 0

      When to add the whole column selection function to DataGrid. Users often need to copy the contents of an entire column, and it would be great if you could add the whole column selection function

  • Alex Lambert 0

    Doe WPF now properly work with INotifyCollectionChanged using ranges?

    • Pankaj ChaurasiaMicrosoft employee 1

      Not yet. This is currently in our backlog and under planning.

  • Hughes, Danial 1

    This is great news! The first WPF update in literally years!
    However, after reading the WinForms .NET 7 update and comparing to what’s been delivered here, it’s disappointing that there does not seem to be a coherent plan moving forward, apart from just ‘turn around community PR’s faster’.
    Hopefully some momentum can build up and longstanding issues with WPF can be addressed in .NET 8.

    • Pankaj ChaurasiaMicrosoft employee 3

      Thanks for the feedback @Danial. Over the last few years, WPF team had been more focused on improving the underlying infrastructure that can help the community and the team move faster. With the infrastructure support in place, we would be able deliver on the product enhancements and long-standing issues.

  • Alexey Gvozdikov 1

    Any chance you backport improvements to WPF for .NET Framework? Despite your optimistic work on raw .NET Core, A LOT of people still stays on stable .NET FW and we NEED improvements. We heard a lot about how WPF is fast, but IT IS NOT. Improvements can change situation when modern 4GHz CPU cannot handle simplistic grid in WPF.

    • Pankaj ChaurasiaMicrosoft employee 1

      No, any improvements to WPF will be solely focused on .NET Core only. And yes, (aligned with entire .NET Core charter) performance improvements will be a major investment area in upcoming releases as well.

    • Jim Foye 0

      You knew what the answer to that question was going to be.

  • Gauthier M. 2

    Good to see that WPF is still alive in .Net 7.

    I have lost my time with UWP platform in the past and I don’t want lost my time again with MAUI.
    So I realy expect that WPF will receive new features like style update to match Windows 10 and 11 UI in near futur.

    • Pankaj ChaurasiaMicrosoft employee 3

      It definitely will. 🙂

  • Eugene Ivanoff 1

    Is it possible to create, say, generic StyleSelector to avoid casting?

  • shusong lu 1

    Can WPF support AOT?Can the dependency of COM be cancelled?

  • Roy Lai 0

    Is it possible to resolve the airspace issue thoroughly? There always are some problems in most of the existed solutions.

  • Simon Boucher 0

    Is there a bug in .NET 7 WPF, with the ItemsControl ?
    The override of “PrepareContainerForItemOverride()” is only called for the first item in my CustomControl, deriving from ItemsControl.
    When using .NET 6 WPF, it was called for every items.

    Could anything has changed related to VirtualizingPanel.IsVirtualizingWhenGrouping ?
    Thank you

    • Ashish Kumar SinghMicrosoft employee 0

      There is a commit pertaining to ItemsControl, but that is performance related. Could you please register an issue with the sample repro at wpf github repo?

      • Simon Boucher 1

        A Sample could be difficult to create.

        What I can see is that attached property VirtualizingPanel.IsVirtualizingWhenGrouping should be set to false when VirtualizingStackPanel.IsVirtualizing is false.
        If VirtualizingPanel.IsVirtualizingWhenGrouping is true while VirtualizingStackPanel.IsVirtualizing is false, my panel is only displying the first item.
        I think there is something different between .NET 6 and .NET 7 related to this. But any way, if I set VirtualizingPanel.IsVirtualizingWhenGrouping based on VirtualizingStackPanel.IsVirtualizing, my custom panel is working.

  • Faheem Ahmad 0

    Please add windows 11 like ui option for us to truly make our apps shine, add new ui and ux from maui fluent ui

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