fix #615 - F# project references doesn't open in VS extension

fix #685 - "open in ilspy" in F# project returns error, fails

ILSpy.AddIn/ILSpyAddInPackage.cs

@@ -98,14 +98,14 @@ namespace ICSharpCode.ILSpy.AddIn
 		private void OpenReferenceInILSpyCallback(object sender, EventArgs e)
 		{
 			var explorer = ((EnvDTE80.DTE2)GetGlobalService(typeof(EnvDTE.DTE))).ToolWindows.SolutionExplorer;
-			var items =(object[]) explorer.SelectedItems;
+			var items = (object[])explorer.SelectedItems;
 
 			foreach (EnvDTE.UIHierarchyItem item in items) {
-				dynamic reference = item.Object;
+				var reference = GetReference(item.Object);
 				string path = null;
-				if (reference.PublicKeyToken != "") {
+				if (!string.IsNullOrEmpty(reference.PublicKeyToken)) {
 					var token = Utils.HexStringToBytes(reference.PublicKeyToken);
-					path = GacInterop.FindAssemblyInNetGac(new AssemblyNameReference(reference.Identity, new Version(reference.Version)) { PublicKeyToken = token });
+					path = GacInterop.FindAssemblyInNetGac(new AssemblyNameReference(reference.Name, reference.Version) { PublicKeyToken = token });
 				}
 				if (path == null)
 					path = reference.Path;
@@ -113,6 +113,38 @@ namespace ICSharpCode.ILSpy.AddIn
 			}
 		}
 
+		class ReferenceInfo
+		{
+			public string Name { get; set; }
+			public string PublicKeyToken { get; set; }
+			public string Path { get; set; }
+			public Version Version { get; set; }
+		}
+
+		private ReferenceInfo GetReference(object o)
+		{
+			dynamic obj = o;
+			string referenceType = o.GetType().FullName;
+
+			// C++
+			if (referenceType.StartsWith("Microsoft.VisualStudio.PlatformUI", StringComparison.Ordinal)) {
+				return new ReferenceInfo { Path = obj.Name };
+			}
+
+			// F#
+			if (referenceType.StartsWith("Microsoft.VisualStudio.FSharp", StringComparison.Ordinal)) {
+				obj = obj.Object;
+			}
+
+			// C# and VB
+			return new ReferenceInfo {
+				Name = obj.Identity,
+				PublicKeyToken = obj.PublicKeyToken,
+				Path = obj.Path,
+				Version = new Version(obj.Version)
+			};
+		}
+
 		private void OpenProjectOutputInILSpyCallback(object sender, EventArgs e)
 		{
 			var explorer = ((EnvDTE80.DTE2)GetGlobalService(typeof(EnvDTE.DTE))).ToolWindows.SolutionExplorer;

ILSpy.AddIn/Utils.cs

@@ -106,6 +106,8 @@ namespace ICSharpCode.ILSpy.AddIn
 
 		public static byte[] HexStringToBytes(string hex)
 		{
+			if (hex == null)
+				throw new ArgumentNullException(nameof(hex));
 			var result = new byte[hex.Length / 2];
 			for (int i = 0; i < hex.Length / 2; i++) {
 				result[i] = Convert.ToByte(hex.Substring(i * 2, 2), 16);

ILSpy/Languages/IResourceFileHandler.cs

@@ -1,4 +1,22 @@
-using System;
+// Copyright (c) 2011 AlphaSierraPapa for the SharpDevelop Team
+// 
+// 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;
 using System.IO;
 
 namespace ICSharpCode.ILSpy