Update known issues index for WPF 593963

Author: vivmishra

releases/net472/dotnet472-known-issues.md

@@ -6,6 +6,7 @@ This document lists the known issues that you may experience after you install t
 ## Product issues for the .NET Framework 4.7.2   
 - [405199 - WPF - Non-Adorner TextSelection Occludes Text](https://github.com/Microsoft/dotnet/blob/master/releases/net472/KnownIssues/405199%20-%20WPF%20Non-Adorner%20TextSelection%20Occludes%20Text.md)
 - [504055 - WPF - WPF May Not Show Touch Keyboard In All Scenarios on Windows 10 April 2018 Update](https://github.com/Microsoft/dotnet/blob/master/releases/net472/KnownIssues/504055%20-%20WPF%20May%20Not%20Show%20Touch%20Keyboard%20In%20All%20Scenarios%20on%20Windows%2010%20April%202018%20Update.md)
+- [593963 - WPF - WPF Exceptions during AppDomain or process shutdown](hhttps://github.com/Microsoft/dotnet/blob/master/releases/net472/KnownIssues/593963%20-%20WPF%20Exceptions%20during%20AppDomain%20or%20process%20shutdown.md)
 - [560016 - XBAP - Applications targeting .NET 2.0,3.5 select wrong runtime version](https://github.com/Microsoft/dotnet/blob/master/releases/net472/KnownIssues/560016-XBAP%20Applications%20targeting%20.NET%202.0%2C3.5%20select%20wrong%20runtime%20version.md)
 - [611802 - SQL - SQLConnection.ConnectionString throws NullReferenceException](https://github.com/Microsoft/dotnet/blob/master/releases/net472/KnownIssues/611802%20-%20SQLConnection.ConnectionString%20throws%20NullReferenceException%20.md)
 - [613745 - BCL - Single-name references are removed by the SDK when targeting 4.7.2](https://github.com/Microsoft/dotnet/blob/master/releases/net472/KnownIssues/613745%20-%20Single-name%20references%20are%20removed%20by%20the%20SDK%20when%20targeting%204.7.2.md)