@@ -10,3 +10,8 @@ It was never the intent for these members to be a part of the supported API surf
PR: https://github.com/dotnet/roslyn/pull/4169
### Changed Simplifier methods to throw ArgumentNullExceptions
Changed Simplifier.ReduceAsync, Simplifier.ExpandAsync, and Simplifier.Expand methods to throw ArgumentNullExceptions if any non-optional, nullable arguments are passed in. Previously the user would get a NullReferenceException for synchronous methods and an AggregateException containing a NullReferenceException for asynchronous methods.
