fix build of conversion to .Net 4.5

Author: RubenWillems

project/UnitTests/WebDashboard/IO/ConditionalGetFingerprintTest.cs

@@ -49,7 +49,7 @@ public void ShouldNeverEqualNotAvailable()
         [Test]
         public void NotAvailableNotEvenEqualToItself()
         {
-            Assert.AreNotEqual(ConditionalGetFingerprint.NOT_AVAILABLE, ConditionalGetFingerprint.NOT_AVAILABLE);
+            Assert.IsFalse(ConditionalGetFingerprint.NOT_AVAILABLE.Equals(ConditionalGetFingerprint.NOT_AVAILABLE));
             Assert.AreSame(ConditionalGetFingerprint.NOT_AVAILABLE, ConditionalGetFingerprint.NOT_AVAILABLE);
         }
 

project/WebDashboard/IO/ConditionalGetFingerprint.cs

@@ -27,8 +27,13 @@ public ConditionalGetFingerprint Combine(ConditionalGetFingerprint other)
 
         public override bool Equals(object obj)
         {
-            if (this == NOT_AVAILABLE || obj == NOT_AVAILABLE) return false;
-            if (this == obj) return true;
+            System.Diagnostics.Debug.WriteLine("Equals obj");
+
+            if (ReferenceEquals(this,NOT_AVAILABLE)) return false;
+            if (ReferenceEquals(obj, NOT_AVAILABLE)) return false;
+            
+            if (ReferenceEquals(this, obj)) return true;
+            
             ConditionalGetFingerprint conditionalGetFingerprint = obj as ConditionalGetFingerprint;
             if (conditionalGetFingerprint == null) return false;
 
@@ -51,5 +56,6 @@ public string ETag
         {
             get { return eTag; }
         }
+
     }
 }