.NET Framework 4.7.1 Known Issues
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This document lists the known issues that you may experience after you install the Microsoft .NET Framework 4.7.1.   

## Product issues for the .NET Framework 4.7.1   
- [479874 - WPF Touch Stops Working After Rapid/Prolonged Use Of Popups](https://github.com/Microsoft/dotnet/blob/net471/releases/net471/KnownIssues/479874-WPF%20Touch%20Stops%20Working%20After%20Prolonged%20Use%20of%20Popups.md)
- [481090 - WPF Touch generates a NullReferenceException in WispLogic.ProcessInputReport](https://github.com/Microsoft/dotnet/blob/net471/releases/net471/KnownIssues/481090-WPF%20Touch%20generates%20NullReferenceException%20in%20ProcessInputReport.md)
- [489937 - WPF Touch/Stylus Generates AccessViolations and Heap Corruption in GetPenEventMultiple](https://github.com/Microsoft/dotnet/blob/net471/releases/net471/KnownIssues/489937-WPF%20Touch%20and%20Stylus%20AccessViolation%20in%20GetPenEventMultiple.md)
- [493108 - WPF InvalidCastException when displaying a checked MenuItem](https://github.com/Microsoft/dotnet/blob/net471/releases/net471/KnownIssues/493108-WPF%20InvalidCastException%20when%20displaying%20a%20checked%20MenuItem.md)