C#: Add change note

csharp/ql/lib/change-notes/2023-11-10-unbound-generics-fqn.md

@@ -0,0 +1,25 @@
+---
+category: minorAnalysis
+---
+
+* The predicate `UnboundGeneric::getName` now prints the number of type parameters as a `` `N`` suffix, instead of a `<,...,>` suffix. For example, the unbound generic type
+`System.Collections.Generic.IList<T>` is printed as ``IList`1`` instead of `IList<>`.
+* The predicates `hasQualifiedName`, `getQualifiedName`, and `getQualifiedNameWithTypes` have been deprecated, and are instead replaced by `hasFullyQualifiedName`, `getFullyQualifiedName`, and `getFullyQualifiedNameWithTypes`, respectively. The new predicates use the same format for unbound generic types as mentioned above.
+* These changes also affect models-as-data rows that refer to a field or a property belonging to a generic type. For example, instead of writing
+```yml
+extensions:
+  - addsTo:
+      pack: codeql/csharp-all
+      extensible: summaryModel
+      data:
+        - ["System.Collections.Generic", "Dictionary<TKey,TValue>", False, "Add", "(System.Collections.Generic.KeyValuePair<TKey,TValue>)", "", "Argument[0].Property[System.Collections.Generic.KeyValuePair<,>.Key]", "Argument[this].Element.Property[System.Collections.Generic.KeyValuePair<,>.Key]", "value", "manual"]
+```
+one now writes
+```yml
+extensions:
+  - addsTo:
+      pack: codeql/csharp-all
+      extensible: summaryModel
+      data:
+        - ["System.Collections.Generic", "Dictionary<TKey,TValue>", False, "Add", "(System.Collections.Generic.KeyValuePair<TKey,TValue>)", "", "Argument[0].Property[System.Collections.Generic.KeyValuePair`2.Key]", "Argument[this].Element.Property[System.Collections.Generic.KeyValuePair`2.Key]", "value", "manual"]
+```