Remove disabled context actions from AddInTree.

src/AddIns/BackendBindings/CSharpBinding/Project/CSharpBinding.addin

@@ -140,8 +140,8 @@
 	</Path>
 	
 	<Path path = "/SharpDevelop/ViewContent/TextEditor/C#/IssueProviders">
-		<Class class = "ICSharpCode.NRefactory.CSharp.Refactoring.AccessToDisposedClosureIssue" />
-		<Class class = "ICSharpCode.NRefactory.CSharp.Refactoring.AccessToModifiedClosureIssue" />
+		<!--<Class class = "ICSharpCode.NRefactory.CSharp.Refactoring.AccessToDisposedClosureIssue" />
+		<Class class = "ICSharpCode.NRefactory.CSharp.Refactoring.AccessToModifiedClosureIssue" />-->
 		<Class class = "ICSharpCode.NRefactory.CSharp.Refactoring.AssignmentMadeToSameVariableIssue" />
 		<Class class = "ICSharpCode.NRefactory.CSharp.Refactoring.BitwiseOperationOnNonFlagsEnumIssue" />
 		<Class class = "ICSharpCode.NRefactory.CSharp.Refactoring.CallToObjectEqualsViaBaseIssue" />

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Refactoring/IssueManager.cs

@@ -52,6 +52,8 @@ namespace CSharpBinding.Refactoring
 				if (attributes.Length == 1) {
 					this.Attribute = (IssueDescriptionAttribute)attributes[0];
 					defaultSeverity = this.Attribute.Severity;
+				} else {
+					SD.Log.Warn("Issue provider without attribute: " + ProviderType);
 				}
 				var properties = PropertyService.NestedProperties("CSharpIssueSeveritySettings");
 				this.CurrentSeverity = properties.Get(ProviderType.FullName, defaultSeverity);

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Refactoring/SearchForIssuesDialog.xaml.cs

@@ -68,7 +68,8 @@ namespace CSharpBinding.Refactoring
 		{
 			internal RootTreeNode(IEnumerable<IssueManager.IssueProvider> providers)
 			{
-				this.Children.AddRange(providers.GroupBy(p => p.Attribute.Category, (key, g) => new CategoryTreeNode(key, g)));
+				this.Children.AddRange(providers.Where(p => p.Attribute != null)
+				                       .GroupBy(p => p.Attribute.Category, (key, g) => new CategoryTreeNode(key, g)));
 				this.IsChecked = false;
 				this.IsExpanded = true;
 			}

src/AddIns/BackendBindings/CSharpBinding/Tests/RegistrationTests.cs

@@ -7,6 +7,7 @@ using System.Linq;
 using System.Reflection;
 using CSharpBinding.Refactoring;
 using ICSharpCode.Core;
+using ICSharpCode.NRefactory.CSharp;
 using ICSharpCode.NRefactory.CSharp.Refactoring;
 using NUnit.Framework;
 using Rhino.Mocks;
@@ -46,11 +47,11 @@ namespace CSharpBinding.Tests
 			
 			registeredIssueProviders = addIn.Paths["/SharpDevelop/ViewContent/TextEditor/C#/IssueProviders"].Codons
 				.Select(c => FindType(c.Properties["class"])).ToList();
-			NRissueProviders = NRCSharp.ExportedTypes.Where(t => !t.IsAbstract && t.GetInterface(typeof(ICodeIssueProvider).FullName) != null).ToList();
+			NRissueProviders = NRCSharp.ExportedTypes.Where(t => t.GetCustomAttribute<IssueDescriptionAttribute>() != null).ToList();
 			
 			registeredContextActions = addIn.Paths["/SharpDevelop/ViewContent/TextEditor/C#/ContextActions"].Codons
 				.Select(c => FindType(c.Properties["class"])).ToList();
-			NRcontextActions = NRCSharp.ExportedTypes.Where(t => !t.IsAbstract && t.GetInterface(typeof(ICodeActionProvider).FullName) != null).ToList();
+			NRcontextActions = NRCSharp.ExportedTypes.Where(t => t.GetCustomAttribute<ContextActionAttribute>() != null).ToList();
 		}
 		
 		[Test]
@@ -60,6 +61,18 @@ namespace CSharpBinding.Tests
 			Assert.AreEqual(registeredContextActions, registeredContextActions.Distinct());
 		}
 		
+		[Test]
+		public void AllAreRegisteredIssueProvidersHaveAttribute()
+		{
+			Assert.IsTrue(registeredIssueProviders.All(t => t.GetCustomAttribute<IssueDescriptionAttribute>() != null));
+		}
+		
+		[Test]
+		public void AllAreRegisteredContextActionsHaveAttribute()
+		{
+			Assert.IsTrue(registeredContextActions.All(t => t.GetCustomAttribute<ContextActionAttribute>() != null));
+		}
+		
 		[Test]
 		public void AllNRefactoryIssueProvidersAreRegistered()
 		{