Failing test in CompareToSet - don't know why yet...

Specs/CompareToAssist/CompareTo.feature

@@ -24,4 +24,21 @@ Scenario: CompareToInstance
 		| Field		 | Value					|
 		| Name		 | Anders					|
 		| Style      | very cool				|
-		| BirthDate	 | 10/9/1974 12:00:00 AM	|
+		| BirthDate	 | 10/9/1974 12:00:00 AM	|
+
+# CompareToSet will test only the properties that you define in the table. 
+# CompareToSet does not test the order of the objects, only that one was found that matches
+Scenario: CompareToSet 
+	Given I have the following persons using assist 
+		| Name		| Style		| Birth date |
+		| Marcus    | Cool		| 1972-10-09 | 
+		| Anders    | Butch		| 1977-01-01	 | 
+		| Jocke     | Soft		| 1974-04-04 | 
+	Then CompareToSet should match this
+		| Name		| Style		| BirthDate				| 
+		| Marcus    | Cool		| 10/9/1972 12:00:00 AM | 
+		| Anders    | Butch		| 1/1/1977 12:00:00 AM	| 
+		| Jocke     | Soft		| 4/4/1974 12:00:00 AM	| 
+	And CompareToSet should not match this
+		| Name		| Style		| BirthDate				|  
+		| Marcus    | Cool		| 10/9/1972 12:00:00 AM | 

Specs/CompareToAssist/CompareToSteps.cs

@@ -1,4 +1,5 @@
-using Should.Fluent;
+using System.Collections.Generic;
+using Should.Fluent;
 using Specs.TestEntities;
 using TechTalk.SpecFlow;
 using TechTalk.SpecFlow.Assist;
@@ -35,5 +36,28 @@ public void CompareToInstanceShouldNotMatch(Table instanceTableToNotMatch)
                 ex.Message.Should().Not.Be.Empty();
             }
         }
+
+
+        [Then(@"CompareToSet should match this")]
+        public void CompareToSetShouldMatch(Table tableToMatch)
+        {
+            var persons = ScenarioContext.Current.Get<List<Person>>();
+            tableToMatch.CompareToSet(persons);
+        }
+
+        [Then(@"CompareToSet should not match this")]
+        public void CompareToSetShouldNotMatch(Table tableToNotMatch)
+        {
+            var persons = ScenarioContext.Current.Get<List<Person>>();
+
+            try
+            {
+                tableToNotMatch.CompareToInstance(persons);
+            }
+            catch (ComparisonException ex)
+            {
+                ex.Message.Should().Not.Be.Empty();
+            }
+        }
     }
 }

Specs/TestEntities/Person.cs

@@ -18,5 +18,10 @@ public override bool Equals(object obj)
                 (Style == pIn.Style) &&
                 (BirthDate == pIn.BirthDate);
         }
+
+        public override int GetHashCode()
+        {
+            return base.GetHashCode();
+        }
     }
 }