Initial move from old twain-in-dotnet.

NTwain/Triplets/DGAudio/DGAudio.cs

@@ -0,0 +1,68 @@
+// The MIT License (MIT)
+// Copyright (c) 2013 Yin-Chun Wang
+//
+// Permission is hereby granted, free of charge, to any person obtaining a 
+// copy of this software and associated documentation files (the "Software"), 
+// to deal in the Software without restriction, including without limitation 
+// the rights to use, copy, modify, merge, publish, distribute, sublicense, 
+// and/or sell copies of the Software, and to permit persons to whom the 
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included 
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 
+// OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+namespace NTwain.Triplets
+{
+	/// <summary>
+	/// Class for grouping triplet operations under the Audio data group.
+	/// </summary>
+	public sealed class DGAudio
+	{
+		TwainSession _session;
+		internal DGAudio(TwainSession session)
+		{
+			if (session == null) { throw new ArgumentNullException("session"); }
+			_session = session;
+		}
+
+
+		AudioFileXfer _audioFileXfer;
+		internal AudioFileXfer AudioFileXfer
+		{
+			get
+			{
+				if (_audioFileXfer == null) { _audioFileXfer = new AudioFileXfer(_session); }
+				return _audioFileXfer;
+			}
+		}
+
+		AudioInfo _audioInfo;
+		public AudioInfo AudioInfo
+		{
+			get
+			{
+				if (_audioInfo == null) { _audioInfo = new AudioInfo(_session); }
+				return _audioInfo;
+			}
+		}
+
+		AudioNativeXfer _audioNativeXfer;
+		internal AudioNativeXfer AudioNativeXfer
+		{
+			get
+			{
+				if (_audioNativeXfer == null) { _audioNativeXfer = new AudioNativeXfer(_session); }
+				return _audioNativeXfer;
+			}
+		}
+	}
+}