Update dotnet472-known-issues.md

saurabh500 · web-flow · commit 8d1e3b9bd777 · 2018-05-10T12:02:29.000-07:00
diff --git a/releases/net472/dotnet472-known-issues.md b/releases/net472/dotnet472-known-issues.md
@@ -7,3 +7,4 @@ This document lists the known issues that you may experience after you install t
 - [405199 - WPF - 405199 - 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)
 - [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 - SQLConnection.ConnectionString throws NullReferenceException] (https://github.com/Microsoft/dotnet/blob/master/releases/net472/KnownIssues/611802%20-%20SQLConnection.ConnectionString%20throws%20NullReferenceException%20.md)
