CurtHagenlocher commented on code in PR #4340:
URL: https://github.com/apache/arrow-adbc/pull/4340#discussion_r3277441080


##########
csharp/src/Apache.Arrow.Adbc/DriverManager/TomlParser.cs:
##########
@@ -140,29 +152,59 @@ private static void ValidateSectionName(string 
sectionName)
             }
         }
 
+        private static void ValidateKeyName(string keyName)
+        {
+            // Only bare keys are supported. Dotted, quoted, and 
whitespace-containing
+            // keys are recognized TOML productions that this parser 
deliberately rejects
+            // rather than misinterpret.
+            if (keyName.Length == 0)
+            {
+                throw new FormatException("Invalid TOML key: key is empty.");
+            }
+
+            for (int i = 0; i < keyName.Length; i++)

Review Comment:
   Okay, that was more than I expected I'd need to learn about TOML :).



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