Add "nonnull*" to keyword list
Is in printed book but not keyword list
MODIFY
src/Chapter16/Listing16.CSharp.cs
src/Chapter16/Listing16.CSharp.cs
@@ -16,8 +16,8 @@ namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter16.Listing16
"false","finally","fixed","float","for","foreach",
"from*","get*","global*","goto","group*","if","implicit",
"in","int","interface","internal","into*","is","join*",
- "let*","lock","long", "nameof*", "namespace","new","null",
- "object","on*","operator","orderby*","out","override",
+ "let*","lock","long", "nameof*", "namespace","new","nonnull*",
+ "null","object","on*","operator","orderby*","out","override",
"params","partial*","private","protected","public",
"readonly","ref","remove*","return","sbyte","sealed",
"select*","set*","short","sizeof","stackalloc","static",

Add "nonnull*" to keyword list

Is in printed book but not keyword list