1 files changed, 55 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.Core/Messaging/IStreamSerializingDataBag.cs b/src/DotNetOpenAuth.Core/Messaging/IStreamSerializingDataBag.cs
new file mode 100644
index 0000000..2003f9e
--- /dev/null
+++ b/src/DotNetOpenAuth.Core/Messaging/IStreamSerializingDataBag.cs
@@ -0,0 +1,55 @@
+//-----------------------------------------------------------------------
+// <copyright file="IStreamSerializingDataBag.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.Messaging {
+	using System;
+	using System.Diagnostics.Contracts;
+	using System.IO;
+
+	/// <summary>
+	/// An interface implemented by <see cref="DataBag"/>-derived types that support binary serialization.
+	/// </summary>
+	[ContractClass(typeof(IStreamSerializingDataBaContract))]
+	internal interface IStreamSerializingDataBag {
+		/// <summary>
+		/// Serializes the instance to the specified stream.
+		/// </summary>
+		/// <param name="stream">The stream.</param>
+		void Serialize(Stream stream);
+
+		/// <summary>
+		/// Initializes the fields on this instance from the specified stream.
+		/// </summary>
+		/// <param name="stream">The stream.</param>
+		void Deserialize(Stream stream);
+	}
+
+	/// <summary>
+	/// Code Contract for the <see cref="IStreamSerializingDataBag"/> interface.
+	/// </summary>
+	[ContractClassFor(typeof(IStreamSerializingDataBag))]
+	internal abstract class IStreamSerializingDataBaContract : IStreamSerializingDataBag {
+		/// <summary>
+		/// Serializes the instance to the specified stream.
+		/// </summary>
+		/// <param name="stream">The stream.</param>
+		void IStreamSerializingDataBag.Serialize(Stream stream) {
+			Contract.Requires(stream != null);
+			Contract.Requires(stream.CanWrite);
+			throw new NotImplementedException();
+		}
+
+		/// <summary>
+		/// Initializes the fields on this instance from the specified stream.
+		/// </summary>
+		/// <param name="stream">The stream.</param>
+		void IStreamSerializingDataBag.Deserialize(Stream stream) {
+			Contract.Requires(stream != null);
+			Contract.Requires(stream.CanRead);
+			throw new NotImplementedException();
+		}
+	}
+}