diff --git a/Skills/FactorGraphs/Variable.cs b/Skills/FactorGraphs/Variable.cs
index 7d64f51..80a3bc7 100644
--- a/Skills/FactorGraphs/Variable.cs
+++ b/Skills/FactorGraphs/Variable.cs
@@ -43,7 +43,7 @@ namespace Moserware.Skills.FactorGraphs
 
     public class KeyedVariable<TKey, TValue> : Variable<TValue>
     {
-        public KeyedVariable(TKey key, string name, VariableFactory<TValue> parentFactory, int parentIndex, TValue prior)
+        public KeyedVariable(TKey key, string name, TValue prior)
             : base(name, prior)
         {
             Key = key;
diff --git a/Skills/FactorGraphs/VariableFactory.cs b/Skills/FactorGraphs/VariableFactory.cs
index 1e1a5b0..d07b5ff 100644
--- a/Skills/FactorGraphs/VariableFactory.cs
+++ b/Skills/FactorGraphs/VariableFactory.cs
@@ -6,7 +6,6 @@ namespace Moserware.Skills.FactorGraphs
     public class VariableFactory<TValue>
     {
         // using a Func<TValue> to encourage fresh copies in case it's overwritten
-        private readonly List<Variable<TValue>> _CreatedVariables = new List<Variable<TValue>>();
         private readonly Func<TValue> _VariablePriorInitializer;
 
         public VariableFactory(Func<TValue> variablePriorInitializer)
@@ -20,7 +19,6 @@ namespace Moserware.Skills.FactorGraphs
                 String.Format(nameFormat, args),                                
                 _VariablePriorInitializer());
 
-            _CreatedVariables.Add(newVar);
             return newVar;
         }
 
@@ -28,12 +26,9 @@ namespace Moserware.Skills.FactorGraphs
         {
             var newVar = new KeyedVariable<TKey, TValue>(
                 key,
-                String.Format(nameFormat, args),
-                this,
-                _CreatedVariables.Count,
+                String.Format(nameFormat, args),                                
                 _VariablePriorInitializer());
-
-            _CreatedVariables.Add(newVar);
+            
             return newVar;
         }
     }
diff --git a/Skills/bin/Debug/Moserware.Skills.dll b/Skills/bin/Debug/Moserware.Skills.dll
index 52a75bf..7d29b38 100644
Binary files a/Skills/bin/Debug/Moserware.Skills.dll and b/Skills/bin/Debug/Moserware.Skills.dll differ
diff --git a/Skills/bin/Debug/Moserware.Skills.pdb b/Skills/bin/Debug/Moserware.Skills.pdb
index f1ac5b1..fedcd2f 100644
Binary files a/Skills/bin/Debug/Moserware.Skills.pdb and b/Skills/bin/Debug/Moserware.Skills.pdb differ
diff --git a/Skills/bin/Release/Moserware.Skills.dll b/Skills/bin/Release/Moserware.Skills.dll
index 57140f5..ce161dd 100644
Binary files a/Skills/bin/Release/Moserware.Skills.dll and b/Skills/bin/Release/Moserware.Skills.dll differ
diff --git a/Skills/bin/Release/Moserware.Skills.pdb b/Skills/bin/Release/Moserware.Skills.pdb
index 0449cef..f0f47f8 100644
Binary files a/Skills/bin/Release/Moserware.Skills.pdb and b/Skills/bin/Release/Moserware.Skills.pdb differ