Replaces DNOA's internal Requires class with Validation NuGet package.

24 files changed, 37 insertions, 7 deletions

diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/DotNetOpenAuth.OpenId.RelyingParty.csproj b/src/DotNetOpenAuth.OpenId.RelyingParty/DotNetOpenAuth.OpenId.RelyingParty.csproj
index 3ebd698..6728601 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/DotNetOpenAuth.OpenId.RelyingParty.csproj
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/DotNetOpenAuth.OpenId.RelyingParty.csproj
@@ -61,6 +61,7 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="OpenId\RelyingParty\OpenIdRelyingParty.cd" />
+    <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\DotNetOpenAuth.Core\DotNetOpenAuth.Core.csproj">
@@ -78,6 +79,10 @@
   </ItemGroup>
   <ItemGroup>
     <Reference Include="System" />
+    <Reference Include="Validation, Version=2.0.0.0, Culture=neutral, PublicKeyToken=2fc06f0d701809a7, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Validation.2.0.0.12319\lib\portable-windows8+net40+sl5+windowsphone8\Validation.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Folder Include="ComponentModel\" />
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/ExtensionsBindingElementRelyingParty.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/ExtensionsBindingElementRelyingParty.cs
index fca62f8..205a63d 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/ExtensionsBindingElementRelyingParty.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/ExtensionsBindingElementRelyingParty.cs
@@ -11,6 +11,7 @@ namespace DotNetOpenAuth.OpenId.ChannelElements {
 	using System.Linq;
 	using System.Text;
 	using DotNetOpenAuth.OpenId.RelyingParty;
+	using Validation;
 
 	/// <summary>
 	/// The OpenID binding element responsible for reading/writing OpenID extensions
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/OpenIdRelyingPartyChannel.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/OpenIdRelyingPartyChannel.cs
index e18a103..36ffee1 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/OpenIdRelyingPartyChannel.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/OpenIdRelyingPartyChannel.cs
@@ -14,6 +14,7 @@ namespace DotNetOpenAuth.OpenId.ChannelElements {
 	using DotNetOpenAuth.Messaging.Bindings;
 	using DotNetOpenAuth.OpenId.Extensions;
 	using DotNetOpenAuth.OpenId.RelyingParty;
+	using Validation;
 
 	/// <summary>
 	/// The messaging channel for OpenID relying parties.
@@ -42,7 +43,7 @@ namespace DotNetOpenAuth.OpenId.ChannelElements {
 			base(messageTypeProvider, InitializeBindingElements(cryptoKeyStore, nonceStore, securitySettings, nonVerifying)) {
 			Requires.NotNull(messageTypeProvider, "messageTypeProvider");
 			Requires.NotNull(securitySettings, "securitySettings");
-			Requires.True(!nonVerifying || securitySettings is RelyingPartySecuritySettings);
+			Assumes.True(!nonVerifying || securitySettings is RelyingPartySecuritySettings);
 		}
 
 		/// <summary>
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/ReturnToNonceBindingElement.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/ReturnToNonceBindingElement.cs
index 2aa735a..bfcdf1d 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/ReturnToNonceBindingElement.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/ChannelElements/ReturnToNonceBindingElement.cs
@@ -14,6 +14,7 @@ namespace DotNetOpenAuth.OpenId.ChannelElements {
 	using DotNetOpenAuth.Messaging.Bindings;
 	using DotNetOpenAuth.OpenId.Messages;
 	using DotNetOpenAuth.OpenId.RelyingParty;
+	using Validation;
 
 	/// <summary>
 	/// This binding element adds a nonce to a Relying Party's outgoing 
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/HostMetaDiscoveryService.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/HostMetaDiscoveryService.cs
index 7336275..b6d91e9 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/HostMetaDiscoveryService.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/HostMetaDiscoveryService.cs
@@ -27,6 +27,7 @@ namespace DotNetOpenAuth.OpenId {
 	using DotNetOpenAuth.OpenId.RelyingParty;
 	using DotNetOpenAuth.Xrds;
 	using DotNetOpenAuth.Yadis;
+	using Validation;
 
 	/// <summary>
 	/// The discovery service to support host-meta based discovery, such as Google Apps for Domains.
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Interop/AuthenticationResponseShim.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Interop/AuthenticationResponseShim.cs
index e6d6609..f4134b9 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Interop/AuthenticationResponseShim.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Interop/AuthenticationResponseShim.cs
@@ -13,6 +13,7 @@ namespace DotNetOpenAuth.OpenId.Interop {
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId.Extensions.SimpleRegistration;
 	using DotNetOpenAuth.OpenId.RelyingParty;
+	using Validation;
 
 	/// <summary>
 	/// The COM type used to provide details of an authentication result to a relying party COM client.
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Interop/ClaimsResponseShim.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Interop/ClaimsResponseShim.cs
index 2569395..e53ff46 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Interop/ClaimsResponseShim.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Interop/ClaimsResponseShim.cs
@@ -11,6 +11,7 @@ namespace DotNetOpenAuth.OpenId.Interop {
 	using System.Runtime.InteropServices;
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId.Extensions.SimpleRegistration;
+	using Validation;
 
 	/// <summary>
 	/// A struct storing Simple Registration field values describing an
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Messages/AssociateRequestRelyingParty.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Messages/AssociateRequestRelyingParty.cs
index 1ac8488..e82aeea 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Messages/AssociateRequestRelyingParty.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Messages/AssociateRequestRelyingParty.cs
@@ -11,6 +11,7 @@ namespace DotNetOpenAuth.OpenId.Messages {
 	using System.Linq;
 	using System.Text;
 	using DotNetOpenAuth.OpenId.RelyingParty;
+	using Validation;
 
 	/// <summary>
 	/// Utility methods for requesting associations from the relying party.
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Messages/IAssociateSuccessfulResponseRelyingPartyContract.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Messages/IAssociateSuccessfulResponseRelyingPartyContract.cs
index e870c33..ad53778 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Messages/IAssociateSuccessfulResponseRelyingPartyContract.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/Messages/IAssociateSuccessfulResponseRelyingPartyContract.cs
@@ -13,6 +13,7 @@ namespace DotNetOpenAuth {
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId;
 	using DotNetOpenAuth.OpenId.Messages;
+	using Validation;
 
 	/// <summary>
 	/// Code contract for the <see cref="IAssociateSuccessfulResponseRelyingParty"/> interface.
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/AssociationManager.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/AssociationManager.cs
index e6feac1..88bb86a 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/AssociationManager.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/AssociationManager.cs
@@ -15,6 +15,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId.ChannelElements;
 	using DotNetOpenAuth.OpenId.Messages;
+	using Validation;
 
 	/// <summary>
 	/// Manages the establishment, storage and retrieval of associations at the relying party.
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Associations.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Associations.cs
index f315bf0..cd0341e 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Associations.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Associations.cs
@@ -13,6 +13,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 	using System.Diagnostics.Contracts;
 	using System.Linq;
 	using DotNetOpenAuth.Messaging;
+	using Validation;
 
 	/// <summary>
 	/// A dictionary of handle/Association pairs.
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/AuthenticationRequest.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/AuthenticationRequest.cs
index 8af817e..d14a402 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/AuthenticationRequest.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/AuthenticationRequest.cs
@@ -18,6 +18,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId.ChannelElements;
 	using DotNetOpenAuth.OpenId.Messages;
+	using Validation;
 
 	/// <summary>
 	/// Facilitates customization and creation and an authentication request
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/CryptoKeyStoreAsRelyingPartyAssociationStore.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/CryptoKeyStoreAsRelyingPartyAssociationStore.cs
index 7ad1346..2e104a7 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/CryptoKeyStoreAsRelyingPartyAssociationStore.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/CryptoKeyStoreAsRelyingPartyAssociationStore.cs
@@ -9,6 +9,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 	using System.Diagnostics.Contracts;
 	using System.Linq;
 	using DotNetOpenAuth.Messaging.Bindings;
+	using Validation;
 
 	/// <summary>
 	/// Wraps a standard <see cref="ICryptoKeyStore"/> so that it behaves as an association store.
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/ExtensionsInteropHelper.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/ExtensionsInteropHelper.cs
index d57fede..460d6a3 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/ExtensionsInteropHelper.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/ExtensionsInteropHelper.cs
@@ -15,6 +15,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty.Extensions {
 	using DotNetOpenAuth.OpenId.Extensions.AttributeExchange;
 	using DotNetOpenAuth.OpenId.Extensions.SimpleRegistration;
 	using DotNetOpenAuth.OpenId.Messages;
+	using Validation;
 
 	/// <summary>
 	/// A set of methods designed to assist in improving interop across different
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/UIUtilities.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/UIUtilities.cs
index 049430a..5c35995 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/UIUtilities.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/UIUtilities.cs
@@ -10,6 +10,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty.Extensions.UI {
 	using System.Globalization;
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId.RelyingParty;
+	using Validation;
 
 	/// <summary>
 	/// Constants used in implementing support for the UI extension.
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/FailedAuthenticationResponse.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/FailedAuthenticationResponse.cs
index 764062e..6203185 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/FailedAuthenticationResponse.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/FailedAuthenticationResponse.cs
@@ -16,6 +16,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 	using DotNetOpenAuth.OpenId;
 	using DotNetOpenAuth.OpenId.Messages;
 	using DotNetOpenAuth.OpenId.RelyingParty;
+	using Validation;
 
 	/// <summary>
 	/// Wraps a failed authentication response in an <see cref="IAuthenticationResponse"/> instance
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/IRelyingPartyAssociationStore.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/IRelyingPartyAssociationStore.cs
index a97449e..5d54a80 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/IRelyingPartyAssociationStore.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/IRelyingPartyAssociationStore.cs
@@ -7,6 +7,7 @@
 namespace DotNetOpenAuth.OpenId.RelyingParty {
 	using System;
 	using System.Diagnostics.Contracts;
+	using Validation;
 
 	/// <summary>
 	/// Stores <see cref="Association"/>s for lookup by their handle, keeping
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/ISetupRequiredAuthenticationResponse.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/ISetupRequiredAuthenticationResponse.cs
index 2d23cfc..691a8ee 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/ISetupRequiredAuthenticationResponse.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/ISetupRequiredAuthenticationResponse.cs
@@ -41,7 +41,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 		/// </summary>
 		Identifier ISetupRequiredAuthenticationResponse.UserSuppliedIdentifier {
 			get {
-				Requires.ValidState(((IAuthenticationResponse)this).Status == AuthenticationStatus.SetupRequired, OpenIdStrings.OperationOnlyValidForSetupRequiredState);
+				RequiresEx.ValidState(((IAuthenticationResponse)this).Status == AuthenticationStatus.SetupRequired, OpenIdStrings.OperationOnlyValidForSetupRequiredState);
 				throw new System.NotImplementedException();
 			}
 		}
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/NegativeAuthenticationResponse.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/NegativeAuthenticationResponse.cs
index 5837449..080898d 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/NegativeAuthenticationResponse.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/NegativeAuthenticationResponse.cs
@@ -12,6 +12,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 	using System.Web;
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId.Messages;
+	using Validation;
 
 	/// <summary>
 	/// Wraps a negative assertion response in an <see cref="IAuthenticationResponse"/> instance
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/OpenIdRelyingParty.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/OpenIdRelyingParty.cs
index 6264041..0b6cf41 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/OpenIdRelyingParty.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/OpenIdRelyingParty.cs
@@ -24,6 +24,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 	using DotNetOpenAuth.OpenId.ChannelElements;
 	using DotNetOpenAuth.OpenId.Extensions;
 	using DotNetOpenAuth.OpenId.Messages;
+	using Validation;
 
 	/// <summary>
 	/// A delegate that decides whether a given OpenID Provider endpoint may be
@@ -114,7 +115,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 			// If we are a smart-mode RP (supporting associations), then we MUST also be 
 			// capable of storing nonces to prevent replay attacks.
 			// If we're a dumb-mode RP, then 2.0 OPs are responsible for preventing replays.
-			Requires.True(cryptoKeyStore == null || nonceStore != null, null, OpenIdStrings.AssociationStoreRequiresNonceStore);
+			Requires.That(cryptoKeyStore == null || nonceStore != null, null, OpenIdStrings.AssociationStoreRequiresNonceStore);
 
 			this.securitySettings = OpenIdElement.Configuration.RelyingParty.SecuritySettings.CreateSecuritySettings();
 
@@ -477,7 +478,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 		/// </remarks>
 		/// <exception cref="InvalidOperationException">Thrown if <see cref="HttpContext.Current">HttpContext.Current</see> == <c>null</c>.</exception>
 		public IEnumerable<IAuthenticationRequest> CreateRequests(Identifier userSuppliedIdentifier, Realm realm) {
-			Requires.ValidState(HttpContext.Current != null && HttpContext.Current.Request != null, MessagingStrings.HttpContextRequired);
+			RequiresEx.ValidState(HttpContext.Current != null && HttpContext.Current.Request != null, MessagingStrings.HttpContextRequired);
 			Requires.NotNull(userSuppliedIdentifier, "userSuppliedIdentifier");
 			Requires.NotNull(realm, "realm");
 			Contract.Ensures(Contract.Result<IEnumerable<IAuthenticationRequest>>() != null);
@@ -526,7 +527,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 		/// <exception cref="InvalidOperationException">Thrown if <see cref="HttpContext.Current">HttpContext.Current</see> == <c>null</c>.</exception>
 		public IEnumerable<IAuthenticationRequest> CreateRequests(Identifier userSuppliedIdentifier) {
 			Requires.NotNull(userSuppliedIdentifier, "userSuppliedIdentifier");
-			Requires.ValidState(HttpContext.Current != null && HttpContext.Current.Request != null, MessagingStrings.HttpContextRequired);
+			RequiresEx.ValidState(HttpContext.Current != null && HttpContext.Current.Request != null, MessagingStrings.HttpContextRequired);
 			Contract.Ensures(Contract.Result<IEnumerable<IAuthenticationRequest>>() != null);
 
 			return this.CreateRequests(userSuppliedIdentifier, Realm.AutoDetect);
@@ -540,7 +541,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 		/// <para>Requires an <see cref="HttpContext.Current">HttpContext.Current</see> context.</para>
 		/// </remarks>
 		public IAuthenticationResponse GetResponse() {
-			Requires.ValidState(HttpContext.Current != null && HttpContext.Current.Request != null, MessagingStrings.HttpContextRequired);
+			RequiresEx.ValidState(HttpContext.Current != null && HttpContext.Current.Request != null, MessagingStrings.HttpContextRequired);
 			return this.GetResponse(this.Channel.GetRequestFromContext());
 		}
 
@@ -593,7 +594,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 		/// <para>Requires an <see cref="HttpContext.Current">HttpContext.Current</see> context.</para>
 		/// </remarks>
 		public OutgoingWebResponse ProcessResponseFromPopup() {
-			Requires.ValidState(HttpContext.Current != null && HttpContext.Current.Request != null, MessagingStrings.HttpContextRequired);
+			RequiresEx.ValidState(HttpContext.Current != null && HttpContext.Current.Request != null, MessagingStrings.HttpContextRequired);
 			Contract.Ensures(Contract.Result<OutgoingWebResponse>() != null);
 
 			return this.ProcessResponseFromPopup(this.Channel.GetRequestFromContext());
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAnonymousResponse.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAnonymousResponse.cs
index 3f4692a..5f62e2d 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAnonymousResponse.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAnonymousResponse.cs
@@ -12,6 +12,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 	using System.Web;
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId.Messages;
+	using Validation;
 
 	/// <summary>
 	/// Wraps an extension-only response from the OP in an <see cref="IAuthenticationResponse"/> instance
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAuthenticationResponse.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAuthenticationResponse.cs
index 2a06c9b..9069221 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAuthenticationResponse.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAuthenticationResponse.cs
@@ -12,6 +12,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 	using System.Web;
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId.Messages;
+	using Validation;
 
 	/// <summary>
 	/// Wraps a positive assertion response in an <see cref="IAuthenticationResponse"/> instance
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAuthenticationResponseSnapshot.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAuthenticationResponseSnapshot.cs
index f5cf8ad..eb3d373 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAuthenticationResponseSnapshot.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/PositiveAuthenticationResponseSnapshot.cs
@@ -12,6 +12,7 @@ namespace DotNetOpenAuth.OpenId.RelyingParty {
 	using System.Web;
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId.Messages;
+	using Validation;
 
 	/// <summary>
 	/// A serializable snapshot of a verified authentication message.
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/packages.config b/src/DotNetOpenAuth.OpenId.RelyingParty/packages.config
new file mode 100644
index 0000000..10eec89
--- /dev/null
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/packages.config
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Validation" version="2.0.0.12319" targetFramework="net40" />
+</packages>
\ No newline at end of file