1 files changed, 36 insertions, 0 deletions
diff --git a/tests/src/Regressions/coreclr/9414/readonlyPrefix.cs b/tests/src/Regressions/coreclr/9414/readonlyPrefix.cs
new file mode 100644
index 0000000000..05148a1800
--- /dev/null
+++ b/tests/src/Regressions/coreclr/9414/readonlyPrefix.cs
@@ -0,0 +1,36 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+class Program
+{
+    interface IFrobber
+    {
+        void Frob();
+    }
+
+    class Frobber : IFrobber
+    {
+        public void Frob()
+        {
+        }
+    }
+
+    class Foo<T> where T : IFrobber
+    {
+        public static void FrobAll(T[,] arr)
+        {
+            for (int i = 0; i < arr.Length; i++)
+            {
+                // 'readonly' prefix on call to array's Address method must be respected, and the type check bypassed
+                arr[0, i].Frob();
+            }
+        }
+    }
+
+    private static int Main()
+    {
+        Foo<IFrobber>.FrobAll(new Frobber[,] { { new Frobber() } });
+        return 100;
+    }
+}