1 files changed, 0 insertions, 116 deletions
diff --git a/mcs/class/System.ComponentModel.Composition/src/ComponentModel/Microsoft/Internal/Collections/ConditionalWeakTable.cs b/mcs/class/System.ComponentModel.Composition/src/ComponentModel/Microsoft/Internal/Collections/ConditionalWeakTable.cs
deleted file mode 100644
index d25dad3357b..00000000000
--- a/mcs/class/System.ComponentModel.Composition/src/ComponentModel/Microsoft/Internal/Collections/ConditionalWeakTable.cs
+++ /dev/null
@@ -1,116 +0,0 @@
-// -----------------------------------------------------------------------
-// Copyright (c) Microsoft Corporation.  All rights reserved.
-// -----------------------------------------------------------------------
-#if !CLR40
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.Linq;
-using Microsoft.Internal;
-using Microsoft.Internal.Collections;
-
-namespace Microsoft.Internal.Collections
-{
-    // This is a broken implementation of ConditionalWeakTable that allows us
-    // to compile and work on versions of .Net eariler then 4.0. This class is
-    // broken when there are circular dependencies between keys and values, which
-    // can only be fixed by using some specific CLR 4.0 features.
-    // For code samples of the broken behavior see ConditionalWeakTableTests.cs.
-    internal class ConditionalWeakTable<TKey, TValue> 
-        where TKey : class
-        where TValue : class
-    {
-        private readonly Dictionary<object, TValue> _table;
-        private int _capacity = 4;
-
-        public ConditionalWeakTable()
-        {
-            this._table = new Dictionary<object, TValue>();
-        }
-
-        public void Add(TKey key, TValue value)
-        {
-            CleanupDeadReferences();
-            this._table.Add(CreateWeakKey(key), value);
-        }
-
-        public bool Remove(TKey key)
-        {
-            return this._table.Remove(key);
-        }
-
-        public bool TryGetValue(TKey key, out TValue value)
-        {
-            return this._table.TryGetValue(key, out value);
-        }
-
-        private void CleanupDeadReferences()
-        {
-            if (this._table.Count < _capacity)
-            {
-                return;
-            }
-
-            object[] deadKeys = this._table.Keys
-                .Where(weakRef => !((EquivalentWeakReference)weakRef).IsAlive).ToArray();
-
-            foreach (var deadKey in deadKeys)
-            {
-                this._table.Remove(deadKey);
-            }
-
-            if (this._table.Count >= _capacity)
-            {
-                _capacity *= 2;
-            }
-        }
-
-        private static object CreateWeakKey(TKey key)
-        {
-            return new EquivalentWeakReference(key);
-        }
-
-        private class EquivalentWeakReference
-        {
-            private readonly WeakReference _weakReference;
-            private readonly int _hashCode;
-
-            public EquivalentWeakReference(object obj)
-            {
-                this._hashCode = obj.GetHashCode();
-                this._weakReference = new WeakReference(obj);
-            }
-
-            public bool IsAlive
-            {
-                get
-                {
-                    return this._weakReference.IsAlive;
-                }
-            }
-
-            public override bool Equals(object obj)
-            {
-                EquivalentWeakReference weakRef = obj as EquivalentWeakReference;
-
-                if (weakRef != null)
-                {
-                    obj = weakRef._weakReference.Target;
-                }
-
-                if (obj == null)
-                {
-                    return base.Equals(weakRef);
-                }
-                
-                return object.Equals(this._weakReference.Target, obj);
-            }
-
-            public override int GetHashCode()
-            {
-                return this._hashCode;
-            }
-        }
-    }
-}
-#endif
-\ No newline at end of file