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diff --git a/src/DotNetOAuth/Messaging/Bindings/NonceMemoryStore.cs b/src/DotNetOAuth/Messaging/Bindings/NonceMemoryStore.cs
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+++ b/src/DotNetOAuth/Messaging/Bindings/NonceMemoryStore.cs
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+//-----------------------------------------------------------------------
+// <copyright file="NonceMemoryStore.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOAuth.Messaging.Bindings {
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Text;
+	using DotNetOAuth.Messaging.Bindings;
+
+	/// <summary>
+	/// An in-memory nonce store.  Useful for single-server web applications.
+	/// NOT for web farms.
+	/// </summary>
+	internal class NonceMemoryStore : INonceStore {
+		#region INonceStore Members
+
+		/// <summary>
+		/// Stores a given nonce and timestamp.
+		/// </summary>
+		/// <param name="nonce">
+		/// A series of random characters.
+		/// </param>
+		/// <param name="timestamp">
+		/// The timestamp that together with the nonce string make it unique.
+		/// The timestamp may also be used by the data store to clear out old nonces.
+		/// </param>
+		/// <returns>
+		/// True if the nonce+timestamp (combination) was not previously in the database.
+		/// False if the nonce was stored previously with the same timestamp.
+		/// </returns>
+		/// <remarks>
+		/// The nonce must be stored for no less than the maximum time window a message may
+		/// be processed within before being discarded as an expired message.
+		/// If the binding element is applicable to your channel, this expiration window
+		/// is retrieved or set using the 
+		/// <see cref="StandardExpirationBindingElement.MaximumMessageAge"/> property.
+		/// </remarks>
+		public bool StoreNonce(string nonce, DateTime timestamp) {
+			throw new NotImplementedException();
+		}
+
+		#endregion
+	}
+}