C#: Add upgrade- and downgrade scripts.

Author: michaelnebel

csharp/downgrades/66044cfa5bbf2ecfabd06ead25e91db2bdd79764/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 = 138 then kind = 106 else kind = k
+select e, kind, t