1 files changed, 41 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.Core/Messaging/MessageProtectionTasks.cs b/src/DotNetOpenAuth.Core/Messaging/MessageProtectionTasks.cs
new file mode 100644
index 0000000..37c86ca
--- /dev/null
+++ b/src/DotNetOpenAuth.Core/Messaging/MessageProtectionTasks.cs
@@ -0,0 +1,41 @@
+//-----------------------------------------------------------------------
+// <copyright file="MessageProtectionTasks.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.Messaging {
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Text;
+	using System.Threading.Tasks;
+
+	/// <summary>
+	/// Reusable pre-completed tasks that may be returned multiple times to reduce GC pressure.
+	/// </summary>
+	internal static class MessageProtectionTasks {
+		/// <summary>
+		/// A task whose result is <c>null</c>
+		/// </summary>
+		internal static readonly Task<MessageProtections?> Null = Task.FromResult<MessageProtections?>(null);
+
+		/// <summary>
+		/// A task whose result is <see cref="MessageProtections.None"/>
+		/// </summary>
+		internal static readonly Task<MessageProtections?> None =
+			Task.FromResult<MessageProtections?>(MessageProtections.None);
+
+		/// <summary>
+		/// A task whose result is <see cref="MessageProtections.TamperProtection"/>
+		/// </summary>
+		internal static readonly Task<MessageProtections?> TamperProtection =
+			Task.FromResult<MessageProtections?>(MessageProtections.TamperProtection);
+
+		/// <summary>
+		/// A task whose result is <see cref="MessageProtections.ReplayProtection"/>
+		/// </summary>
+		internal static readonly Task<MessageProtections?> ReplayProtection =
+			Task.FromResult<MessageProtections?>(MessageProtections.ReplayProtection);
+	}
+}