Fix error when installing latest jQuery NuGet package.

src/AddIns/Misc/PackageManagement/Project/Src/EnvDTE/DTE.cs

@@ -29,6 +29,10 @@ namespace ICSharpCode.PackageManagement.EnvDTE
 			ItemOperations = new ItemOperations(fileService);
 		}
 		
+		public string Version {
+			get { return "10.0"; }
+		}
+		
 		public Solution Solution {
 			get {
 				if (IsSolutionOpen) {

src/AddIns/Misc/PackageManagement/Test/Src/EnvDTE/DTETests.cs

@@ -137,5 +137,15 @@ namespace PackageManagement.Tests.EnvDTE
 			
 			Assert.AreEqual("ProjectA", name);
 		}
+		
+		[Test]
+		public void Version_CheckVersion_Returns10()
+		{
+			CreateDTE();
+			
+			string version = dte.Version;
+			
+			Assert.AreEqual("10.0", version);
+		}
 	}
 }