Symptoms
Assume that you have installed Microsoft .NET Framework 4.6 on your computer that is running Windows 10. When you deploy a Windows Presentation Foundation (WPF) application on your computer, the following Unicode characters do not render correctly:
| Unicode Range | Font | Language Pack |
|---|---|---|
| 0700-074F | Estrangelo Edessa | Syriac |
| 0E80-0EFF | Lao UI | Lao |
| 0E80-0EFF | DokChampa | Lao |
| 1780-17FF, 19E0-19FF | Khmer UI | Khmer |
| 1780-17FF, 19E0-19FF | DaunPenh | Khmer |
| 2F00-2FDF, 3250, 32CC-32CF, 3377-337A, FF00-FF60, FF61-FF9F, FFE0-FFEE | Meiryo UI | Japanese |
| 2F00-2FDF, FF00-FF60, FF61-FF9F, FFE0-FFEE | Meiryo | Japanese |
| 31C0-31EF | MingLiU | Chinese (Traditional) |
| E000-EEB7, F303-F34B, F3A0-F5F1, F634-F848 | MingLiU_HKSCS | Chinese (Traditional) |
| FF00-FF60, FF61-FF9F, FFE0-FFEE | MS Gothic | Japanese |
| FFE0-FFEE | Gulim | Korean |
Cause
This issue occurs because of changes in default installed fonts in Windows 10.
Resolution
To reduce the effects of these concerns, make sure that your applications appropriately declare the recommended xml:lang attribute as per MSDN guidance. For more information about the guidance, see xml:lang Handling in XAML in MSDN and Introducing xml:lang in XAML.
For more information about the known issues in the .NET Framework 4.6, see Known issues for the .NET Framework 4.6 .