WPF xaml deginer tool not reapint.

TR Song 1

I was reinstall vs2019 and install graphic driver.
but, does't fix it.
when scroll the xaml designer tool, it was not repaint.
how can i solution this problem?

DaisyTian-1203 11,621 Reputation points

2020-08-19T07:36:57.59+00:00

What's your wpf target framework? Is it Framework or .Net Core? If you use .Net core, could you try to check if it is the issue with Nahimic's software?The issue in The .Net Core WPF program UI errors seems to be somewhat similar to yours.
TR Song 1 Reputation point

2020-08-21T00:44:17.127+00:00

thank you for you're answer. i use .net framework 4.5 and don't use Nahimic's software. this problem is editing a xaml design mode not runtime.
DaisyTian-1203 11,621 Reputation points

2020-08-24T01:31:15.603+00:00

This doesn't seem to be the native WPF question which more related to Visual studio,I had added the vs-general tag for your question to make it more likely to be seen by people who are good at VS.
Sara Liu-MSFT 346 Reputation points Microsoft Vendor

2020-08-26T09:08:15.887+00:00

Please close VS 2019 and try to clean up the folder %LocalAppData%\Microsoft\VisualStudio\16.0_xxx, reopen VS to check it again.
Sara Liu-MSFT 346 Reputation points Microsoft Vendor

2020-09-04T07:34:20.26+00:00

@TR Song , if you delete this folder, does this issue persists or not? If this method not helps, please update it in here.
Sara Liu-MSFT 346 Reputation points Microsoft Vendor

2020-09-09T01:49:32.853+00:00

@TR Song , it seems this issue was caused by the graphic card driver and thanks for your sharing. By the way, please remember to 'Accept Answer' of your reply, that will also help other community members to easier locate the root cause :)

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WPF xaml deginer tool not reapint.