From 0bf0cbae8fbff9e5eac811286ed319d731d50ffc Mon Sep 17 00:00:00 2001
From: Michael Nebel <michaelnebel@github.com>
Date: Wed, 14 Jan 2026 13:54:09 +0100
Subject: [PATCH] C#: Add some null conditional assignments CFG tests.

---
 .../controlflow/graph/ConditionalAccess.cs    | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/csharp/ql/test/library-tests/controlflow/graph/ConditionalAccess.cs b/csharp/ql/test/library-tests/controlflow/graph/ConditionalAccess.cs
index a03564b529f..b99e940f88b 100644
--- a/csharp/ql/test/library-tests/controlflow/graph/ConditionalAccess.cs
+++ b/csharp/ql/test/library-tests/controlflow/graph/ConditionalAccess.cs
@@ -34,6 +34,25 @@ class ConditionalAccess
         i = 0;
         Prop?.Out(out i);
     }
+
+    string StringProp { get; set; }
+    int IntField;
+    string this[int index]
+    {
+        get { return null; }
+        set { }
+    }
+
+    void M9(ConditionalAccess ca)
+    {
+        ca?.IntField = 42;
+        ca?.StringProp = "Hello";
+        ca?[0] = "Set0";
+        ca?.Prop?.IntField = 84;
+        ca?.Prop?.StringProp = "World";
+        ca?.IntField -= 1;
+        ca?.StringProp += "!";
+    }
 }
 
 static class Ext