C#: Analysis change notes.

Author: calumgrant

change-notes/1.23/analysis-csharp.md

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+# Improvements to C# analysis
+
+The following changes in version 1.23 affect C# analysis in all applications.
+
+## Changes to existing queries
+
+| **Query**                    | **Expected impact**    | **Change**                        |
+|------------------------------|------------------------|-----------------------------------|
+
+## Removal of old queries
+
+## Changes to code extraction
+
+* `nameof` expressions are now extracted correctly when the name is a namespace.
+
+## Changes to QL libraries
+
+* The new class `NamespaceAccess` models accesses to namespaces, for example in `nameof` expressions.
+
+## Changes to autobuilder
+