Initial move from old twain-in-dotnet.

NTwain/Triplets/OpBase.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using NTwain.Values;
+
+namespace NTwain.Triplets
+{
+	/// <summary>
+	/// Base class for grouping triplet operations messages.
+	/// </summary>
+	public abstract class OpBase
+	{
+		TwainSession _session;
+		/// <summary>
+		/// Initializes a new instance of the <see cref="OpBase" /> class.
+		/// </summary>
+		/// <param name="session">The session.</param>
+		/// <exception cref="System.ArgumentNullException"></exception>
+		protected OpBase(TwainSession session)
+		{
+			if (session == null) { throw new ArgumentNullException("session"); }
+			_session = session;
+		}
+
+		/// <summary>
+		/// Gets the twain session.
+		/// </summary>
+		/// <value>
+		/// The session.
+		/// </value>
+		protected TwainSession Session { get { return _session; } }
+	}
+}