diff --git a/csharp/downgrades/83aca6b3e4fa38dd2b97b9b51dfc199a2ba9c7f2/expressions.ql b/csharp/downgrades/83aca6b3e4fa38dd2b97b9b51dfc199a2ba9c7f2/expressions.ql
new file mode 100644
index 00000000000..05b9e374f10
--- /dev/null
+++ b/csharp/downgrades/83aca6b3e4fa38dd2b97b9b51dfc199a2ba9c7f2/expressions.ql
@@ -0,0 +1,13 @@
+class Expression extends @expr {
+  string toString() { none() }
+}
+
+class TypeOrRef extends @type_or_ref {
+  string toString() { none() }
+}
+
+from Expression e, int k, int kind, TypeOrRef t
+where
+  expressions(e, k, t) and
+  if k = [131, 132] then kind = 106 else kind = k
+select e, kind, t
diff --git a/csharp/downgrades/83aca6b3e4fa38dd2b97b9b51dfc199a2ba9c7f2/upgrade.properties b/csharp/downgrades/83aca6b3e4fa38dd2b97b9b51dfc199a2ba9c7f2/upgrade.properties
index 0a3603f1ef8..f6ae8c489a2 100644
--- a/csharp/downgrades/83aca6b3e4fa38dd2b97b9b51dfc199a2ba9c7f2/upgrade.properties
+++ b/csharp/downgrades/83aca6b3e4fa38dd2b97b9b51dfc199a2ba9c7f2/upgrade.properties
@@ -1,2 +1,3 @@
 description: Remove list- and slice pattern expression kinds.
 compatibility: backwards
+expressions.rel: run expressions.qlo
\ No newline at end of file