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diff --git a/src/DotNetOpenAuth.Core/Messaging/EmptyEnumerator.cs b/src/DotNetOpenAuth.Core/Messaging/EmptyEnumerator.cs
new file mode 100644
index 0000000..f37e3d4
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+++ b/src/DotNetOpenAuth.Core/Messaging/EmptyEnumerator.cs
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+//-----------------------------------------------------------------------
+// <copyright file="EmptyEnumerator.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.Messaging {
+	using System.Collections;
+
+	/// <summary>
+	/// An enumerator that always generates zero elements.
+	/// </summary>
+	internal class EmptyEnumerator : IEnumerator {
+		/// <summary>
+		/// The singleton instance of this empty enumerator.
+		/// </summary>
+		internal static readonly EmptyEnumerator Instance = new EmptyEnumerator();
+
+		/// <summary>
+		/// Prevents a default instance of the <see cref="EmptyEnumerator"/> class from being created.
+		/// </summary>
+		private EmptyEnumerator() {
+		}
+
+		#region IEnumerator Members
+
+		/// <summary>
+		/// Gets the current element in the collection.
+		/// </summary>
+		/// <value></value>
+		/// <returns>
+		/// The current element in the collection.
+		/// </returns>
+		/// <exception cref="T:System.InvalidOperationException">
+		/// The enumerator is positioned before the first element of the collection or after the last element.
+		/// </exception>
+		public object Current {
+			get { return null; }
+		}
+
+		/// <summary>
+		/// Advances the enumerator to the next element of the collection.
+		/// </summary>
+		/// <returns>
+		/// true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the collection.
+		/// </returns>
+		/// <exception cref="T:System.InvalidOperationException">
+		/// The collection was modified after the enumerator was created.
+		/// </exception>
+		public bool MoveNext() {
+			return false;
+		}
+
+		/// <summary>
+		/// Sets the enumerator to its initial position, which is before the first element in the collection.
+		/// </summary>
+		/// <exception cref="T:System.InvalidOperationException">
+		/// The collection was modified after the enumerator was created.
+		/// </exception>
+		public void Reset() {
+		}
+
+		#endregion
+	}
+}