diff --git a/ValidCode/Dynamic.cs b/ValidCode/Dynamic.cs
new file mode 100644
index 00000000..459f0a29
--- /dev/null
+++ b/ValidCode/Dynamic.cs
@@ -0,0 +1,17 @@
+namespace ValidCode
+{
+    using System.Collections.Generic;
+    using System.Dynamic;
+    using NUnit.Framework;
+
+    public class Dynamic
+    {
+        [Test]
+        public void Index()
+        {
+            dynamic expando = new ExpandoObject();
+            expando.name = "John";
+            Assert.AreEqual("John", ((IDictionary<string, object>)expando)["name"]);
+        }
+    }
+}
diff --git a/ValidCode/ValidCode.csproj b/ValidCode/ValidCode.csproj
index c11c0947..2afac4e2 100644
--- a/ValidCode/ValidCode.csproj
+++ b/ValidCode/ValidCode.csproj
@@ -13,6 +13,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <Reference Include="Microsoft.CSharp" />
     <Reference Include="System.Windows.Forms" />
   </ItemGroup>
 </Project>
\ No newline at end of file