Add some loading information to AssemblyReferenceTreeNode/ReferenceFolderTreeNode.

ICSharpCode.Decompiler/DotNetCore/DotNetCorePathFinder.cs

@@ -40,16 +40,19 @@ namespace ICSharpCode.Decompiler
 		readonly string targetFrameworkId;
 		readonly string version;
 		readonly string dotnetBasePath = FindDotNetExeDirectory();
+		readonly Dictionary<string, UnresolvedAssemblyNameReference> loadInfo;
 
-		public DotNetCorePathFinder(string parentAssemblyFileName, string targetFrameworkId, string version)
+		public DotNetCorePathFinder(string parentAssemblyFileName, string targetFrameworkId, string version, Dictionary<string, UnresolvedAssemblyNameReference> loadInfo)
 		{
 			this.assemblyName = Path.GetFileNameWithoutExtension(parentAssemblyFileName);
 			this.basePath = Path.GetDirectoryName(parentAssemblyFileName);
 			this.targetFrameworkId = targetFrameworkId;
 			this.version = version;
+			this.loadInfo = loadInfo;
 
 			var depsJsonFileName = Path.Combine(basePath, $"{assemblyName}.deps.json");
 			if (!File.Exists(depsJsonFileName)) {
+				loadInfo.AddMessage(assemblyName, MessageKind.Error, $"{assemblyName}.deps.json could not be found!");
 				return;
 			}
 

ICSharpCode.Decompiler/DotNetCore/DotNetCorePathFinderExtensions.cs

@@ -29,5 +29,16 @@ namespace ICSharpCode.Decompiler
 
 			return string.Empty;
 		}
+
+		public static void AddMessage(this Dictionary<string, UnresolvedAssemblyNameReference> container, string fullName, MessageKind kind, string message)
+		{
+			if (container == null)
+				throw new ArgumentNullException(nameof(container));
+			if (!container.TryGetValue(fullName, out var referenceInfo)) {
+				referenceInfo = new UnresolvedAssemblyNameReference(fullName);
+				container.Add(fullName, referenceInfo);
+			}
+			referenceInfo.Messages.Add((kind, message));
+		}
 	}
 }

ICSharpCode.Decompiler/DotNetCore/UnresolvedAssemblyNameReference.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ICSharpCode.Decompiler
+{
+	public sealed class UnresolvedAssemblyNameReference
+	{
+		public string FullName { get; }
+
+		public bool HasErrors => Messages.Any(m => m.Item1 == MessageKind.Error);
+
+		public List<(MessageKind, string)> Messages { get; } = new List<(MessageKind, string)>();
+
+		public UnresolvedAssemblyNameReference(string fullName)
+		{
+			this.FullName = fullName;
+		}
+	}
+
+	public enum MessageKind { Error, Warning, Info }
+}

ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj

@@ -260,6 +260,7 @@
     <Compile Include="Documentation\XmlDocumentationProvider.cs" />
     <Compile Include="DotNetCore\DotNetCorePathFinder.cs" />
     <Compile Include="DotNetCore\DotNetCorePathFinderExtensions.cs" />
+    <Compile Include="DotNetCore\UnresolvedAssemblyNameReference.cs" />
     <Compile Include="IL\ControlFlow\AsyncAwaitDecompiler.cs" />
     <Compile Include="IL\ControlFlow\ControlFlowGraph.cs" />
     <Compile Include="IL\ControlFlow\StateRangeAnalysis.cs" />
@@ -274,6 +275,7 @@
     <Compile Include="IL\Transforms\NullCoalescingTransform.cs" />
     <Compile Include="IL\Transforms\TransformCollectionAndObjectInitializers.cs" />
     <Compile Include="Output\TextTokenWriter.cs" />
+    <Compile Include="Util\KeyComparer.cs" />
     <Compile Include="Util\UnicodeNewline.cs" />
     <Compile Include="FlowAnalysis\ControlFlowNode.cs" />
     <Compile Include="FlowAnalysis\DataFlowVisitor.cs" />

ILSpy/LoadedAssembly.cs

@@ -17,7 +17,9 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System;
+using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Threading.Tasks;
 using System.Windows.Threading;
 using ICSharpCode.Decompiler;
@@ -36,6 +38,7 @@ namespace ICSharpCode.ILSpy
 		readonly string fileName;
 		readonly string shortName;
 		readonly Lazy<string> targetFrameworkId;
+		readonly Dictionary<string, UnresolvedAssemblyNameReference> loadedAssemblyReferences = new Dictionary<string, UnresolvedAssemblyNameReference>();
 
 		public LoadedAssembly(AssemblyList assemblyList, string fileName, Stream stream = null)
 		{
@@ -51,8 +54,13 @@ namespace ICSharpCode.ILSpy
 			this.targetFrameworkId = new Lazy<string>(AssemblyDefinition.DetectTargetFrameworkId, false);
 		}
 
+		/// <summary>
+		/// Returns a target framework identifier in the form '&lt;framework&gt;Version=v&lt;version&gt;'.
+		/// </summary>
 		public string TargetFrameworkId => targetFrameworkId.Value;
 
+		public Dictionary<string, UnresolvedAssemblyNameReference> LoadedAssemblyReferencesInfo => loadedAssemblyReferences;
+
 		/// <summary>
 		/// Gets the Cecil ModuleDefinition.
 		/// Can be null when there was a load error.
@@ -77,18 +85,12 @@ namespace ICSharpCode.ILSpy
 				return module != null ? module.Assembly : null;
 			}
 		}
-		
+
-		public AssemblyList AssemblyList {
+		public AssemblyList AssemblyList => assemblyList;
-			get { return assemblyList; }
+
-		}
+		public string FileName => fileName;
-		
+
-		public string FileName {
+		public string ShortName => shortName;
-			get { return fileName; }
-		}
-		
-		public string ShortName {
-			get { return shortName; }
-		}
 
 		public string Text {
 			get {
@@ -99,14 +101,10 @@ namespace ICSharpCode.ILSpy
 				}
 			}
 		}
-		
+
-		public bool IsLoaded {
+		public bool IsLoaded => assemblyTask.IsCompleted;
-			get { return assemblyTask.IsCompleted; }
+
-		}
+		public bool HasLoadError => assemblyTask.IsFaulted;
-		
-		public bool HasLoadError {
-			get { return assemblyTask.IsFaulted; }
-		}
 
 		public bool IsAutoLoaded { get; set; }
 
@@ -266,7 +264,7 @@ namespace ICSharpCode.ILSpy
 					if (targetFramework.Length != 2) break;
 					if (dotNetCorePathFinder == null) {
 						var version = targetFramework[1].Length == 3 ? targetFramework[1] + ".0" : targetFramework[1];
-						dotNetCorePathFinder = new DotNetCorePathFinder(fileName, TargetFrameworkId, version);
+						dotNetCorePathFinder = new DotNetCorePathFinder(fileName, TargetFrameworkId, version, this.loadedAssemblyReferences);
 					}
 					file = dotNetCorePathFinder.TryResolveDotNetCore(name);
 					break;
@@ -282,8 +280,10 @@ namespace ICSharpCode.ILSpy
 					file = Path.Combine(dir, name.Name + ".exe");
 			}
 			if (file != null) {
+				loadedAssemblyReferences.AddMessage(fullName, MessageKind.Info, "Success - Loading from: " + file);
 				return assemblyList.OpenAssembly(file, true);
 			} else {
+				loadedAssemblyReferences.AddMessage(fullName, MessageKind.Error, "Could not find reference: " + fullName);
 				return null;
 			}
 		}

ILSpy/TreeNodes/AssemblyReferenceTreeNode.cs

@@ -88,10 +88,22 @@ namespace ICSharpCode.ILSpy.TreeNodes
 		
 		public override void Decompile(Language language, ITextOutput output, DecompilationOptions options)
 		{
+			var loaded = parentAssembly.LoadedAssembly.LoadedAssemblyReferencesInfo.TryGetValue(r.FullName, out var info);
 			if (r.IsWindowsRuntime) {
-				language.WriteCommentLine(output, r.Name + " [WinRT]");
+				language.WriteCommentLine(output, r.Name + " [WinRT]" + (!loaded ? " (unresolved)" : ""));
 			} else {
-				language.WriteCommentLine(output, r.FullName);
+				language.WriteCommentLine(output, r.FullName + (!loaded ? " (unresolved)" : ""));
+			}
+			if (loaded) {
+				output.Indent();
+				language.WriteCommentLine(output, "Assembly reference loading information:");
+				if (info.HasErrors)
+					language.WriteCommentLine(output, "There were some problems during assembly reference load, see below for more information!");
+				foreach (var item in info.Messages) {
+					language.WriteCommentLine(output, $"{item.Item1}: {item.Item2}");
+				}
+				output.Unindent();
+				output.WriteLine();
 			}
 		}
 	}

ILSpy/TreeNodes/ReferenceFolderTreeNode.cs

@@ -61,7 +61,10 @@ namespace ICSharpCode.ILSpy.TreeNodes
 		
 		public override void Decompile(Language language, ITextOutput output, DecompilationOptions options)
 		{
+			language.WriteCommentLine(output, $"Detected Target-Framework-Id: {parentAssembly.LoadedAssembly.TargetFrameworkId}");
 			App.Current.Dispatcher.Invoke(DispatcherPriority.Normal, new Action(EnsureLazyChildren));
+			output.WriteLine();
+			language.WriteCommentLine(output, "Referenced assemblies (in metadata order):");
 			// Show metadata order of references
 			foreach (var r in module.AssemblyReferences)
 				new AssemblyReferenceTreeNode(r, parentAssembly).Decompile(language, output, options);