Fix issue #1762

ICSharpCode.Decompiler/CSharp/CSharpDecompiler.cs

@@ -783,6 +783,7 @@ namespace ICSharpCode.Decompiler.CSharp
 			syntaxTree = new SyntaxTree();
 
 			foreach (var type in types) {
+				CancellationToken.ThrowIfCancellationRequested();
 				if (type.IsNil)
 					throw new ArgumentException("types contains null element");
 				RequiredNamespaceCollector.CollectNamespaces(type, module, decompileRun.Namespaces);

ICSharpCode.Decompiler/CSharp/RequiredNamespaceCollector.cs

@@ -122,13 +122,13 @@ namespace ICSharpCode.Decompiler.CSharp
 					break;
 				case IProperty property:
 					HandleAttributes(property.GetAttributes());
-					CollectNamespaces(property.Getter, module);
-					CollectNamespaces(property.Setter, module);
+					CollectNamespaces(property.Getter, module, mappingInfo);
+					CollectNamespaces(property.Setter, module, mappingInfo);
 					break;
 				case IEvent @event:
 					HandleAttributes(@event.GetAttributes());
-					CollectNamespaces(@event.AddAccessor, module);
-					CollectNamespaces(@event.RemoveAccessor, module);
+					CollectNamespaces(@event.AddAccessor, module, mappingInfo);
+					CollectNamespaces(@event.RemoveAccessor, module, mappingInfo);
 					break;
 			}
 		}

ILSpy/LoadedAssembly.cs

@@ -156,7 +156,7 @@ namespace ICSharpCode.ILSpy
 			// runs on background thread
 			if (state is Stream stream) {
 				// Read the module from a precrafted stream
-				module = new PEFile(fileName, stream, metadataOptions: options);
+				module = new PEFile(fileName, stream, stream is MemoryStream ? PEStreamOptions.PrefetchEntireImage : PEStreamOptions.Default, metadataOptions: options);
 			} else {
 				// Read the module from disk (by default)
 				stream = new FileStream(fileName, FileMode.Open, FileAccess.Read);