Reorder code.

src/EditorFeatures/Core/Implementation/Diagnostics/AbstractDiagnosticsTaggerProvider.AggregatingTagger.cs

@@ -163,30 +163,30 @@ public void Dispose()
                 }
             }
 
-            private void DisconnectFromAllTaggers()
+            private void DisconnectFromTagger(IAccurateTagger<TTag> tagger)
             {
                 this.AssertIsForeground();
 
-                foreach (var kvp in _idToProviderAndTagger)
+                tagger.TagsChanged -= OnUnderlyingTaggerTagsChanged;
+                var disposable = tagger as IDisposable;
+                if (disposable != null)
                 {
-                    var tagger = kvp.Value.Item2;
-
-                    DisconnectFromTagger(tagger);
+                    disposable.Dispose();
                 }
-
-                _idToProviderAndTagger.Clear();
             }
 
-            private void DisconnectFromTagger(IAccurateTagger<TTag> tagger)
+            private void DisconnectFromAllTaggers()
             {
                 this.AssertIsForeground();
 
-                tagger.TagsChanged -= OnUnderlyingTaggerTagsChanged;
-                var disposable = tagger as IDisposable;
-                if (disposable != null)
+                foreach (var kvp in _idToProviderAndTagger)
                 {
-                    disposable.Dispose();
+                    var tagger = kvp.Value.Item2;
+
+                    DisconnectFromTagger(tagger);
                 }
+
+                _idToProviderAndTagger.Clear();
             }
 
             private void RegisterNotification(Action action)