[HDPI] TextBox shrinks when running application on 300% DPI
- Dominant language
- C#
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Description
* .NET Core Version:
.NET SDK 6.0.100-preview.6.21313.2
* Have you experienced this same bug with .NET Framework?:
Yes, there have a VSO bug to track: [549652](https://devdiv.visualstudio.com/DevDiv/_workitems/edit/549652)
**Problem description:**
TextBox shrinks after running application on 300% DPI.
**Expected behavior:**
TextBox was scaled well when running application on 300% DPI.
**Minimal repro:**
1. Set Windows DPI as 300%,.
2. Open the attached application.
[WinFormsApp3.zip](https://github.com/dotnet/winforms/files/6661276/WinFormsApp3.zip)
3. Build and run it.
4. Observe the size of TextBox.
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