Annotate service lifetime explicitly.

.editorconfig

@@ -12,7 +12,7 @@ indent_size = 2
 [*.{yml,yaml}]
 indent_style = space
 indent_size = 2
-[*.csproj]
+[*.{csproj,props}]
 indent_style = space
 indent_size = 2
 [*.config]
@@ -119,3 +119,8 @@ csharp_space_between_method_declaration_name_and_open_parenthesis = false
 csharp_space_between_method_declaration_parameter_list_parentheses = false
 csharp_space_between_parentheses = false
 csharp_space_between_square_brackets = false
+
+# Errors and warnings
+
+# MEF006: No importing constructor
+dotnet_diagnostic.MEF006.severity = silent

Directory.Build.props

@@ -0,0 +1,11 @@
+<Project>
+  <PropertyGroup>
+    <ManagePackageVersionsCentrally Condition="'$(ManagePackageVersionsCentrally)'==''">true</ManagePackageVersionsCentrally>
+    <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="TomsToolbox.Composition.Analyzer">
+      <Version Condition="'$(ManagePackageVersionsCentrally)'!='true'">2.18.1</Version>
+    </PackageReference>
+  </ItemGroup>
+</Project>

Directory.Packages.props

@@ -1,8 +1,4 @@
 <Project>
-  <PropertyGroup>
-    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
-    <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
-  </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="AvalonEdit" Version="6.3.0.90" />
     <PackageVersion Include="CliWrap" Version="3.6.6" />
@@ -48,6 +44,6 @@
     <PackageVersion Include="TomsToolbox.Composition.Analyzer" Version="2.18.1" />
     <PackageVersion Include="TomsToolbox.Wpf.Composition" Version="2.18.1" />
     <PackageVersion Include="TomsToolbox.Wpf.Styles" Version="2.18.1" />
-	  <PackageVersion Include="coverlet.collector" Version="6.0.2" />
+    <PackageVersion Include="coverlet.collector" Version="6.0.2" />
   </ItemGroup>
 </Project>

ICSharpCode.Decompiler/ICSharpCode.Decompiler.ruleset

@@ -80,7 +80,6 @@
     <Rule Id="RECS0001" Action="Info" />
   </Rules>
   <Rules AnalyzerId="TomsToolbox.Composition.Analyzer" RuleNamespace="TomsToolbox.Composition.Analyzer">
-    <Rule Id="MEF001" Action="Info" />
     <Rule Id="MEF006" Action="Hidden" />
   </Rules>
 </RuleSet>

ICSharpCode.ILSpyX/Analyzers/Builtin/AttributeAppliedToAnalyzer.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Linq;
 using System.Reflection.Metadata;
 using System.Threading;
@@ -29,6 +30,7 @@
 namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 {
 	[ExportAnalyzer(Header = "Applied To", Order = 10)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class AttributeAppliedToAnalyzer : IAnalyzer
 	{
 		public IEnumerable<ISymbol> Analyze(ISymbol analyzedSymbol, AnalyzerContext context)

ICSharpCode.ILSpyX/Analyzers/Builtin/EventImplementedByAnalyzer.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 
@@ -28,6 +29,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows events that implement an interface event.
 	/// </summary>
 	[ExportAnalyzer(Header = "Implemented By", Order = 10)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class EventImplementedByAnalyzer : IAnalyzer
 	{
 		public IEnumerable<ISymbol> Analyze(ISymbol analyzedSymbol, AnalyzerContext context)

ICSharpCode.ILSpyX/Analyzers/Builtin/EventOverriddenByAnalyzer.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 
@@ -28,6 +29,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows events that override an event.
 	/// </summary>
 	[ExportAnalyzer(Header = "Overridden By", Order = 20)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class EventOverriddenByAnalyzer : IAnalyzer
 	{
 		public IEnumerable<ISymbol> Analyze(ISymbol analyzedSymbol, AnalyzerContext context)

ICSharpCode.ILSpyX/Analyzers/Builtin/FieldAccessAnalyzer.cs

@@ -18,6 +18,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 using System.Reflection.Metadata;
@@ -35,6 +36,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Finds methods where this field is read.
 	/// </summary>
 	[ExportAnalyzer(Header = "Assigned By", Order = 20)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class AssignedByFieldAccessAnalyzer : FieldAccessAnalyzer
 	{
 		public AssignedByFieldAccessAnalyzer() : base(true) { }
@@ -44,6 +46,7 @@ public AssignedByFieldAccessAnalyzer() : base(true) { }
 	/// Finds methods where this field is written.
 	/// </summary>
 	[ExportAnalyzer(Header = "Read By", Order = 10)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class ReadByFieldAccessAnalyzer : FieldAccessAnalyzer
 	{
 		public ReadByFieldAccessAnalyzer() : base(false) { }

ICSharpCode.ILSpyX/Analyzers/Builtin/MemberImplementsInterfaceAnalyzer.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 
@@ -28,6 +29,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows members from all corresponding interfaces the selected member implements.
 	/// </summary>
 	[ExportAnalyzer(Header = "Implements", Order = 40)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class MemberImplementsInterfaceAnalyzer : IAnalyzer
 	{
 		public IEnumerable<ISymbol> Analyze(ISymbol analyzedSymbol, AnalyzerContext context)

ICSharpCode.ILSpyX/Analyzers/Builtin/MethodImplementedByAnalyzer.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 
@@ -28,6 +29,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows methods that implement an interface method.
 	/// </summary>
 	[ExportAnalyzer(Header = "Implemented By", Order = 40)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class MethodImplementedByAnalyzer : IAnalyzer
 	{
 		public IEnumerable<ISymbol> Analyze(ISymbol analyzedSymbol, AnalyzerContext context)

ICSharpCode.ILSpyX/Analyzers/Builtin/MethodOverriddenByAnalyzer.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 
@@ -28,6 +29,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows methods that override a method.
 	/// </summary>
 	[ExportAnalyzer(Header = "Overridden By", Order = 30)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class MethodOverriddenByAnalyzer : IAnalyzer
 	{
 		const GetMemberOptions Options = GetMemberOptions.IgnoreInheritedMembers | GetMemberOptions.ReturnMemberDefinitions;

ICSharpCode.ILSpyX/Analyzers/Builtin/MethodUsedByAnalyzer.cs

@@ -18,6 +18,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 using System.Reflection.Metadata;
@@ -32,6 +33,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows entities that are used by a method.
 	/// </summary>
 	[ExportAnalyzer(Header = "Used By", Order = 20)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class MethodUsedByAnalyzer : IAnalyzer
 	{
 		const GetMemberOptions Options = GetMemberOptions.IgnoreInheritedMembers | GetMemberOptions.ReturnMemberDefinitions;

ICSharpCode.ILSpyX/Analyzers/Builtin/MethodUsesAnalyzer.cs

@@ -18,6 +18,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Linq;
 using System.Reflection.Metadata;
 
@@ -32,6 +33,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows entities that are used by a method.
 	/// </summary>
 	[ExportAnalyzer(Header = "Uses", Order = 10)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class MethodUsesAnalyzer : IAnalyzer
 	{
 		public bool Show(ISymbol symbol) => symbol is IMethod method && method.HasBody;

ICSharpCode.ILSpyX/Analyzers/Builtin/MethodVirtualUsedByAnalyzer.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 using System.Reflection.Metadata;
@@ -31,6 +32,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows entities that are used by a method.
 	/// </summary>
 	[ExportAnalyzer(Header = "Used By", Order = 20)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class MethodVirtualUsedByAnalyzer : IAnalyzer
 	{
 		const GetMemberOptions Options = GetMemberOptions.IgnoreInheritedMembers | GetMemberOptions.ReturnMemberDefinitions;

ICSharpCode.ILSpyX/Analyzers/Builtin/PropertyImplementedByAnalyzer.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 
@@ -28,6 +29,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows properties that implement an interface property.
 	/// </summary>
 	[ExportAnalyzer(Header = "Implemented By", Order = 10)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class PropertyImplementedByAnalyzer : IAnalyzer
 	{
 		public IEnumerable<ISymbol> Analyze(ISymbol analyzedSymbol, AnalyzerContext context)

ICSharpCode.ILSpyX/Analyzers/Builtin/PropertyOverriddenByAnalyzer.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 
@@ -28,6 +29,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows properties that override a property.
 	/// </summary>
 	[ExportAnalyzer(Header = "Overridden By", Order = 20)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class PropertyOverriddenByAnalyzer : IAnalyzer
 	{
 		public IEnumerable<ISymbol> Analyze(ISymbol analyzedSymbol, AnalyzerContext context)

ICSharpCode.ILSpyX/Analyzers/Builtin/TypeExposedByAnalyzer.cs

@@ -22,12 +22,15 @@
 
 namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 {
+	using System.ComponentModel.Composition;
+
 	using ICSharpCode.Decompiler.TypeSystem;
 
 	/// <summary>
 	/// Finds all entities that expose a type.
 	/// </summary>
 	[ExportAnalyzer(Header = "Exposed By", Order = 40)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class TypeExposedByAnalyzer : IAnalyzer
 	{
 		public bool Show(ISymbol entity) => entity is ITypeDefinition;

ICSharpCode.ILSpyX/Analyzers/Builtin/TypeExtensionMethodsAnalyzer.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 
 using ICSharpCode.Decompiler.TypeSystem;
@@ -27,6 +28,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Finds all extension methods defined for a type.
 	/// </summary>
 	[ExportAnalyzer(Header = "Extension Methods", Order = 50)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class TypeExtensionMethodsAnalyzer : IAnalyzer
 	{
 		public bool Show(ISymbol symbol) => symbol is ITypeDefinition entity && !entity.IsStatic;

ICSharpCode.ILSpyX/Analyzers/Builtin/TypeInstantiatedByAnalyzer.cs

@@ -18,6 +18,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 using System.Reflection.Metadata;
@@ -33,6 +34,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows methods that instantiate a type.
 	/// </summary>
 	[ExportAnalyzer(Header = "Instantiated By", Order = 20)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class TypeInstantiatedByAnalyzer : IAnalyzer
 	{
 		const GetMemberOptions Options = GetMemberOptions.IgnoreInheritedMembers | GetMemberOptions.ReturnMemberDefinitions;

ICSharpCode.ILSpyX/Analyzers/Builtin/TypeUsedByAnalyzer.cs

@@ -19,6 +19,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
+using System.ComponentModel.Composition;
 using System.Diagnostics;
 using System.Linq;
 using System.Reflection.Metadata;
@@ -34,6 +35,7 @@ namespace ICSharpCode.ILSpyX.Analyzers.Builtin
 	/// Shows entities that use a type.
 	/// </summary>
 	[ExportAnalyzer(Header = "Used By", Order = 30)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	class TypeUsedByAnalyzer : IAnalyzer
 	{
 		public IEnumerable<ISymbol> Analyze(ISymbol analyzedSymbol, AnalyzerContext context)

ILSpy.BamlDecompiler/BamlResourceNodeFactory.cs

@@ -32,6 +32,7 @@
 namespace ILSpy.BamlDecompiler
 {
 	[Export(typeof(IResourceNodeFactory))]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	public sealed class BamlResourceNodeFactory : IResourceNodeFactory
 	{
 		public ITreeNode CreateNode(Resource resource)
@@ -44,6 +45,7 @@ public ITreeNode CreateNode(Resource resource)
 	}
 
 	[Export(typeof(IResourceFileHandler))]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	public sealed class BamlResourceFileHandler : IResourceFileHandler
 	{
 		public string EntryType => "Page";

ILSpy.ReadyToRun/ReadyToRunLanguage.cs

@@ -95,6 +95,7 @@ public void WriteReference(IMember member, string text, bool isDefinition = fals
 #endif
 
 	[Export(typeof(Language))]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	internal class ReadyToRunLanguage : Language
 	{
 		private static readonly ConditionalWeakTable<MetadataFile, ReadyToRunReaderCacheEntry> readyToRunReaders = new ConditionalWeakTable<MetadataFile, ReadyToRunReaderCacheEntry>();

ILSpy.ReadyToRun/ReadyToRunOptionPage.xaml.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.ComponentModel;
+using System.ComponentModel.Composition;
 using System.Windows.Controls;
 using System.Xml.Linq;
 
@@ -26,6 +27,7 @@
 namespace ICSharpCode.ILSpy.ReadyToRun
 {
 	[ExportOptionPage(Title = nameof(global::ILSpy.ReadyToRun.Properties.Resources.ReadyToRun), Order = 40)]
+	[PartCreationPolicy(CreationPolicy.NonShared)]
 	partial class ReadyToRunOptionPage : UserControl, IOptionPage
 	{
 		public ReadyToRunOptionPage()

ILSpy.sln

@@ -39,6 +39,7 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{D0858E90-DCD5-4FD9-AA53-7262FAB8BEDB}"
 	ProjectSection(SolutionItems) = preProject
 		.editorconfig = .editorconfig
+		Directory.Build.props = Directory.Build.props
 		Directory.Packages.props = Directory.Packages.props
 	EndProjectSection
 EndProject

ILSpy/AboutPage.cs

@@ -17,6 +17,7 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System;
+using System.ComponentModel.Composition;
 using System.IO;
 using System.Text.RegularExpressions;
 using System.Windows;
@@ -36,6 +37,7 @@
 namespace ICSharpCode.ILSpy
 {
 	[ExportMainMenuCommand(ParentMenuID = nameof(Resources._Help), Header = nameof(Resources._About), MenuOrder = 99999)]
+	[PartCreationPolicy(CreationPolicy.Shared)]
 	sealed class AboutPage : SimpleCommand
 	{
 		public override void Execute(object parameter)