diff --git a/Programs/SimExport/DoubleDictionary.cs b/Programs/SimExport/DoubleDictionary.cs
deleted file mode 100644
index 2746817b..00000000
--- a/Programs/SimExport/DoubleDictionary.cs
+++ /dev/null
@@ -1,106 +0,0 @@
-using System;
-using System.Collections.Generic;
-
-namespace SimExport
-{
-    public class DoubleDictionary<TKey1, TKey2, TValue>
-    {
-        Dictionary<TKey1, TValue> Dictionary1;
-        Dictionary<TKey2, TValue> Dictionary2;
-        object syncObject = new object();
-
-        public DoubleDictionary()
-        {
-            Dictionary1 = new Dictionary<TKey1,TValue>();
-            Dictionary2 = new Dictionary<TKey2,TValue>();
-        }
-
-        public DoubleDictionary(int capacity)
-        {
-            Dictionary1 = new Dictionary<TKey1, TValue>(capacity);
-            Dictionary2 = new Dictionary<TKey2, TValue>(capacity);
-        }
-
-        public void Add(TKey1 key1, TKey2 key2, TValue value)
-        {
-            lock (syncObject)
-            {
-                if (Dictionary1.ContainsKey(key1))
-                {
-                    if (!Dictionary2.ContainsKey(key2))
-                        throw new ArgumentException("key1 exists in the dictionary but not key2");
-                }
-                else if (Dictionary2.ContainsKey(key2))
-                {
-                    if (!Dictionary1.ContainsKey(key1))
-                        throw new ArgumentException("key2 exists in the dictionary but not key1");
-                }
-
-                Dictionary1[key1] = value;
-                Dictionary2[key2] = value;
-            }
-        }
-
-        public bool Remove(TKey1 key1, TKey2 key2)
-        {
-            lock (syncObject)
-            {
-                Dictionary1.Remove(key1);
-                return Dictionary2.Remove(key2);
-            }
-        }
-
-        public void Clear()
-        {
-            lock (syncObject)
-            {
-                Dictionary1.Clear();
-                Dictionary2.Clear();
-            }
-        }
-
-        public int Count
-        {
-            get { return Dictionary1.Count; }
-        }
-
-        public bool ContainsKey(TKey1 key)
-        {
-            return Dictionary1.ContainsKey(key);
-        }
-
-        public bool ContainsKey(TKey2 key)
-        {
-            return Dictionary2.ContainsKey(key);
-        }
-
-        public bool TryGetValue(TKey1 key, out TValue value)
-        {
-            return Dictionary1.TryGetValue(key, out value);
-        }
-
-        public bool TryGetValue(TKey2 key, out TValue value)
-        {
-            return Dictionary2.TryGetValue(key, out value);
-        }
-
-        public void ForEach(Action<TValue> action)
-        {
-            lock (syncObject)
-            {
-                foreach (TValue value in Dictionary1.Values)
-                    action(value);
-            }
-        }
-
-        public TValue this[TKey1 key1]
-        {
-            get { return Dictionary1[key1]; }
-        }
-
-        public TValue this[TKey2 key2]
-        {
-            get { return Dictionary2[key2]; }
-        }
-    }
-}