Get rid of referential equality, because it's not guaranteed or desir…

ical.NET.Collections/ical.NET.Collections/GroupedList.cs

@@ -25,7 +25,9 @@ public class GroupedList<TGroup, TItem> :
         protected virtual TGroup GroupModifier(TGroup group)
         {
             if (group == null)
+            {
                 throw new ArgumentNullException(nameof(group), "The item's group cannot be null.");
+            }
 
             return group;
         }

ical.NET.UnitTests/AttendeeTest.cs

@@ -11,7 +11,7 @@ namespace ical.NET.UnitTests
     [TestFixture]
     public class AttendeeTest
     {
-        internal static Event EvtFactory()
+        internal static Event VEventFactory()
         {
             return new Event
             {
@@ -21,61 +21,53 @@ internal static Event EvtFactory()
             };
         }
 
-        const string req = "REQ-PARTICIPANT"; //this string may be added to the api in the future
-        internal static IList<Attendee> AttendeesFactory()
+        private const string _requiredParticipant = "REQ-PARTICIPANT"; //this string may be added to the api in the future
+        private static readonly IList<Attendee> _attendees = new List<Attendee>
         {
-
-            return new[] {
-                new Attendee("MAILTO:[email protected]")
-                {
-                    CommonName = "James James",
-                    Role = req,
-                    Rsvp = true,
-                    ParticipationStatus = ParticipationStatus.Tentative
-                },
-                new Attendee("MAILTO:[email protected]")
-                {
-                    CommonName = "Mary Mary",
-                    Role = req,
-                    Rsvp = true,
-                    ParticipationStatus = ParticipationStatus.Accepted
-                }
-            };
-        }
+            new Attendee("MAILTO:[email protected]")
+            {
+                CommonName = "James James",
+                Role = _requiredParticipant,
+                Rsvp = true,
+                ParticipationStatus = ParticipationStatus.Tentative
+            },
+            new Attendee("MAILTO:[email protected]")
+            {
+                CommonName = "Mary Mary",
+                Role = _requiredParticipant,
+                Rsvp = true,
+                ParticipationStatus = ParticipationStatus.Accepted
+            }
+        }.AsReadOnly();
+
+
         /// <summary>
         /// Ensures that attendees can be properly added to an event.
         /// </summary>
         [Test, Category("Attendee")]
         public void Add1Attendee()
         {
-            var evt = EvtFactory();
+            var evt = VEventFactory();
             Assert.AreEqual(0, evt.Attendees.Count);
 
-            var at = AttendeesFactory();
-
-            evt.Attendees.Add(at[0]);
+            evt.Attendees.Add(_attendees[0]);
             Assert.AreEqual(1, evt.Attendees.Count);
-            Assert.AreSame(at[0], evt.Attendees[0]);
 
             //the properties below had been set to null during the Attendees.Add operation in NuGet version 2.1.4
-            Assert.AreEqual(req, evt.Attendees[0].Role); 
+            Assert.AreEqual(_requiredParticipant, evt.Attendees[0].Role); 
             Assert.AreEqual(ParticipationStatus.Tentative, evt.Attendees[0].ParticipationStatus);
         }
 
         [Test, Category("Attendee")]
         public void Add2Attendees()
         {
-            var evt = EvtFactory();
+            var evt = VEventFactory();
             Assert.AreEqual(0, evt.Attendees.Count);
 
-            var at = AttendeesFactory();
-
-            evt.Attendees.Add(at[0]);
-            evt.Attendees.Add(at[1]);
+            evt.Attendees.Add(_attendees[0]);
+            evt.Attendees.Add(_attendees[1]);
             Assert.AreEqual(2, evt.Attendees.Count);
-            Assert.AreSame(at[1], evt.Attendees[1]);
-
-            Assert.AreEqual(req, evt.Attendees[1].Role);
+            Assert.AreEqual(_requiredParticipant, evt.Attendees[1].Role);
 
             var cal = new Calendar();
             cal.Events.Add(evt);
@@ -89,17 +81,15 @@ public void Add2Attendees()
         [Test, Category("Attendee")]
         public void Remove1Attendee()
         {
-            var evt = EvtFactory();
-
+            var evt = VEventFactory();
             Assert.AreEqual(0, evt.Attendees.Count);
-            var at = AttendeesFactory()[0];
-            evt.Attendees.Add(at);
+
+            var attendee = _attendees[0];
+            evt.Attendees.Add(attendee);
             Assert.AreEqual(1, evt.Attendees.Count);
-            Assert.AreSame(at, evt.Attendees[0]);
 
-            evt.Attendees.Remove(at);
+            evt.Attendees.Remove(attendee);
             Assert.AreEqual(0, evt.Attendees.Count);
         }
-
     }
 }

ical.NET.UnitTests/CopyTest.cs

@@ -16,7 +16,7 @@ public void CopyCalendarTest(string calendarString)
         {
             var iCal1 = Calendar.LoadFromStream(new StringReader(calendarString))[0];
             var iCal2 = iCal1.Copy<ICalendar>();
-            SerializationTest.CompareCalendars(iCal1, iCal2);
+            SerializationTests.CompareCalendars(iCal1, iCal2);
         }
 
         public static IEnumerable<ITestCaseData> CopyCalendarTest_TestCases()

ical.NET.UnitTests/DeserializationTest.cs → ical.NET.UnitTests/DeserializationTests.cs

@@ -19,7 +19,7 @@
 namespace ical.NET.UnitTests
 {
     [TestFixture]
-    public class DeSerializationTest
+    public class DeserializationTests
     {
 
         [Test, Category("Deserialization")]