Fix assertions on AssemblyList.Sort and AssemblyList.Unload. Fix hang on LoadDependencies.Execute.

ILSpy/AssemblyList.cs

@@ -329,7 +329,7 @@ namespace ICSharpCode.ILSpy
 				return null;
 			var newAsm = new LoadedAssembly(this, target.FileName, pdbFileName: target.PdbFileName);
 			newAsm.IsAutoLoaded = target.IsAutoLoaded;
-			lock (assemblies)
+			lock (lockObj)
 			{
 				this.assemblies.Remove(target);
 				this.assemblies.Insert(index, newAsm);
@@ -340,7 +340,7 @@ namespace ICSharpCode.ILSpy
 		public void Unload(LoadedAssembly assembly)
 		{
 			App.Current.Dispatcher.VerifyAccess();
-			lock (assemblies)
+			lock (lockObj)
 			{
 				assemblies.Remove(assembly);
 				byFilename.Remove(assembly.FileName);
@@ -350,7 +350,7 @@ namespace ICSharpCode.ILSpy
 
 		static bool gcRequested;
 
-		void RequestGC()
+		static void RequestGC()
 		{
 			if (gcRequested)
 				return;
@@ -370,7 +370,7 @@ namespace ICSharpCode.ILSpy
 		public void Sort(int index, int count, IComparer<LoadedAssembly> comparer)
 		{
 			App.Current.Dispatcher.VerifyAccess();
-			lock (assemblies)
+			lock (lockObj)
 			{
 				List<LoadedAssembly> list = new List<LoadedAssembly>(assemblies);
 				list.Sort(index, Math.Min(count, list.Count - index), comparer);

ILSpy/TreeNodes/AssemblyTreeNode.cs

@@ -20,6 +20,7 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Documents;
@@ -460,10 +461,11 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			return true;
 		}
 
-		public void Execute(TextViewContext context)
+		public async void Execute(TextViewContext context)
 		{
 			if (context.SelectedTreeNodes == null)
 				return;
+			var tasks = new List<Task>();
 			foreach (var node in context.SelectedTreeNodes)
 			{
 				var la = ((AssemblyTreeNode)node).LoadedAssembly;
@@ -474,10 +476,11 @@ namespace ICSharpCode.ILSpy.TreeNodes
 					var metadata = module.Metadata;
 					foreach (var assyRef in metadata.AssemblyReferences)
 					{
-						resolver.Resolve(new AssemblyReference(module, assyRef));
+						tasks.Add(resolver.ResolveAsync(new AssemblyReference(module, assyRef)));
 					}
 				}
 			}
+			await Task.WhenAll(tasks);
 			MainWindow.Instance.RefreshDecompiledView();
 		}
 	}