1 files changed, 74 insertions, 0 deletions
diff --git a/csharp/src/ProtocolBuffers/Collections/Enumerables.cs b/csharp/src/ProtocolBuffers/Collections/Enumerables.cs
new file mode 100644
index 00000000..7ad9a832
--- /dev/null
+++ b/csharp/src/ProtocolBuffers/Collections/Enumerables.cs
@@ -0,0 +1,74 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// http://github.com/jskeet/dotnet-protobufs/
+// Original C++/Java/Python code:
+// http://code.google.com/p/protobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+using System;
+using System.Collections;
+
+namespace Google.ProtocolBuffers.Collections
+{
+    /// <summary>
+    /// Utility class for IEnumerable (and potentially the generic version in the future).
+    /// </summary>
+    public static class Enumerables
+    {
+        public static bool Equals(IEnumerable left, IEnumerable right)
+        {
+            IEnumerator leftEnumerator = left.GetEnumerator();
+            try
+            {
+                foreach (object rightObject in right)
+                {
+                    if (!leftEnumerator.MoveNext())
+                    {
+                        return false;
+                    }
+                    if (!Equals(leftEnumerator.Current, rightObject))
+                    {
+                        return false;
+                    }
+                }
+                if (leftEnumerator.MoveNext())
+                {
+                    return false;
+                }
+            }
+            finally
+            {
+                IDisposable leftEnumeratorDisposable = leftEnumerator as IDisposable;
+                if (leftEnumeratorDisposable != null)
+                {
+                    leftEnumeratorDisposable.Dispose();
+                }
+            }
+            return true;
+        }
+    }
+}
+\ No newline at end of file