Initial move from old twain-in-dotnet.

Tests/NTwain.Tests/DeviceEventArgsTests.cs

@@ -0,0 +1,25 @@
+using NTwain;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System;
+using NTwain.Values;
+using System.Runtime.Serialization;
+using NTwain.Data;
+
+namespace NTwain.Tests
+{
+    [TestClass]
+    public class DeviceEventArgsTests
+    {
+        [TestMethod]
+        public void Constructor_Sets_Correct_Properties()
+        {
+            // just some non-default values to test
+            TWDeviceEvent evt = new TWDeviceEvent();
+
+            DeviceEventArgs target = new DeviceEventArgs(evt);
+
+            Assert.AreEqual(evt, target.DeviceEvent, "DeviceEvent mismatch.");
+        }
+
+    }
+}