1 files changed, 28 insertions, 0 deletions
diff --git a/src/System.Web.Mvc/ExpressionUtil/DefaultExpressionFingerprint.cs b/src/System.Web.Mvc/ExpressionUtil/DefaultExpressionFingerprint.cs
new file mode 100644
index 00000000..e8503774
--- /dev/null
+++ b/src/System.Web.Mvc/ExpressionUtil/DefaultExpressionFingerprint.cs
@@ -0,0 +1,28 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Linq.Expressions;
+
+#pragma warning disable 659 // overrides AddToHashCodeCombiner instead
+
+namespace System.Web.Mvc.ExpressionUtil
+{
+    // DefaultExpression fingerprint class
+    // Expression of form default(T)
+
+    [SuppressMessage("Microsoft.Usage", "CA2218:OverrideGetHashCodeOnOverridingEquals", Justification = "Overrides AddToHashCodeCombiner() instead.")]
+    internal sealed class DefaultExpressionFingerprint : ExpressionFingerprint
+    {
+        public DefaultExpressionFingerprint(ExpressionType nodeType, Type type)
+            : base(nodeType, type)
+        {
+            // There are no properties on DefaultExpression that are worth including in
+            // the fingerprint.
+        }
+
+        public override bool Equals(object obj)
+        {
+            DefaultExpressionFingerprint other = obj as DefaultExpressionFingerprint;
+            return (other != null)
+                   && this.Equals(other);
+        }
+    }
+}