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-rw-r--r--src/DotNetOpenAuth.OpenId/OpenId/Protocol.cs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/DotNetOpenAuth.OpenId/OpenId/Protocol.cs b/src/DotNetOpenAuth.OpenId/OpenId/Protocol.cs
index 22f5b9c..7ef3ab5 100644
--- a/src/DotNetOpenAuth.OpenId/OpenId/Protocol.cs
+++ b/src/DotNetOpenAuth.OpenId/OpenId/Protocol.cs
@@ -11,8 +11,8 @@ namespace DotNetOpenAuth.OpenId {
using DotNetOpenAuth.Messaging;
using System.Globalization;
using System.Diagnostics.CodeAnalysis;
- using System.Diagnostics.Contracts;
using System.Diagnostics;
+ using Validation;
/// <summary>
/// An enumeration of the OpenID protocol versions supported by this library.