diff --git a/CS2JLibrary/NetFramework/System/Collections/Generic/KeyCollection'1.xml b/CS2JLibrary/NetFramework/System/Collections/Generic/KeyCollection'1.xml
new file mode 100644
index 0000000..b6d21f6
--- /dev/null
+++ b/CS2JLibrary/NetFramework/System/Collections/Generic/KeyCollection'1.xml
@@ -0,0 +1,64 @@
+
+
+
+
+
+ Set*[${T}]*
+
+ System.Collections.Generic.KeyCollection
+
+ T
+
+
+
+
+
+ T
+ ${expr}
+
+
+
+
+ CS2JNet.System.Collections.Generic.KeyCollectionSupport
+
+ KeyCollectionSupport.CopyTo(${this}, ${array}, ${index})
+
+
+ T[]
+ array
+
+
+ System.Int32
+ index
+
+
+ CopyTo
+ System.Void
+
+
+
+
+
+ ${this:16}.size()
+ System.Int32
+ Count
+ ${this:16}.size()
+
+
+
+
+
+
+
+
+
+
+
+rUong3D9EauJhCA+cIiWlGuXn08=esb0vH9iEN6TefBNnLiampoglnuOe2oggi0NVh+r9eoUKf6vzAQCfNGubdlKaf8IausdKZ3wS212MtQtXkJ8TFKPjK+gOpmoVhFKd/6rPnT5xt89+N7s5cByTPW8epjPNnAH7pEiRbzk5+JpH/xKeNCCoGoADV4L/E0TIsZRCH4=
diff --git a/CS2JLibrary/src/CS2JNet/System/Collections/Generic/KeyCollectionSupport.java b/CS2JLibrary/src/CS2JNet/System/Collections/Generic/KeyCollectionSupport.java
new file mode 100644
index 0000000..a3ce32a
--- /dev/null
+++ b/CS2JLibrary/src/CS2JNet/System/Collections/Generic/KeyCollectionSupport.java
@@ -0,0 +1,53 @@
+/*
+ Copyright 2010,2011 Kevin Glynn (kevin.glynn@twigletsoftware.com)
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ Author(s):
+
+ Kevin Glynn (kevin.glynn@twigletsoftware.com)
+*/
+
+package CS2JNet.System.Collections.Generic;
+
+import java.util.Set;
+
+
+/**
+ * @author kevin.glynn@twigletsoftware.com
+ *
+ */
+public class KeyCollectionSupport {
+
+
+ public static void CopyTo(Set keys, T[] array, int index) {
+ if (keys == null)
+ throw new NullPointerException("keys");
+ if (array == null)
+ throw new NullPointerException("array");
+
+ if (index < 0 || index + keys.size() > array.length)
+ throw new IllegalArgumentException("index");
+
+ int i = 0;
+ for (T k : keys) {
+ array[index + i] = k;
+ i++;
+ }
+ if (index + i < array.length) {
+ array[index+i] = null;
+ }
+
+ }
+
+}