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-rw-r--r--src/DotNetOAuth/Messaging/MessageSerializer.cs6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/DotNetOAuth/Messaging/MessageSerializer.cs b/src/DotNetOAuth/Messaging/MessageSerializer.cs
index ac40232..5a39a61 100644
--- a/src/DotNetOAuth/Messaging/MessageSerializer.cs
+++ b/src/DotNetOAuth/Messaging/MessageSerializer.cs
@@ -12,6 +12,7 @@ namespace DotNetOAuth.Messaging {
using System.Runtime.Serialization;
using System.Xml;
using System.Xml.Linq;
+ using System.Diagnostics;
/// <summary>
/// Serializes/deserializes OAuth messages for/from transit.
@@ -46,9 +47,8 @@ namespace DotNetOAuth.Messaging {
/// <param name="messageType">The specific <see cref="IProtocolMessage"/>-derived type
/// that will be serialized and deserialized using this class.</param>
private MessageSerializer(Type messageType) {
- if (messageType == null) {
- throw new ArgumentNullException("messageType");
- }
+ Debug.Assert(messageType != null, "messageType == null");
+
if (!typeof(IProtocolMessage).IsAssignableFrom(messageType)) {
throw new ArgumentException(
string.Format(