Index: Core/Common/src/Core.Common.Assembly/AssemblyResolver.cs
===================================================================
diff -u -rf0b103a6b49b09ffb3ff42970b6a5e9a96c0d910 -rea3246df714ce53d647f1ec1c5c9c6bbccce90eb
--- Core/Common/src/Core.Common.Assembly/AssemblyResolver.cs	(.../AssemblyResolver.cs)	(revision f0b103a6b49b09ffb3ff42970b6a5e9a96c0d910)
+++ Core/Common/src/Core.Common.Assembly/AssemblyResolver.cs	(.../AssemblyResolver.cs)	(revision ea3246df714ce53d647f1ec1c5c9c6bbccce90eb)
@@ -1,4 +1,4 @@
-// Copyright (C) Stichting Deltares 2019. All rights reserved.
+// Copyright (C) Stichting Deltares 2019. All rights reserved.
 //
 // This file is part of Riskeer.
 //
@@ -114,7 +114,7 @@
     {
         private const string assemblySearchPattern = "*.dll";
 
-        private static Dictionary<string, string> assemblyLookup = new Dictionary<string, string>();
+        private static readonly Dictionary<string, string> assemblyLookup = new Dictionary<string, string>();
 
         private static bool initialized;