void FindDerivedClasses(object sender, EventArgs e)
		{
			MenuCommand item = (MenuCommand)sender;
			IClass c = (IClass)item.Tag;
			IEnumerable<IClass> derivedClasses = RefactoringService.FindDerivedClasses(c, ParserService.AllProjectContents, false);
			
			List<SearchResultMatch> results = new List<SearchResultMatch>();
			foreach (IClass derivedClass in derivedClasses) {
				if (derivedClass.CompilationUnit == null) continue;
				if (derivedClass.CompilationUnit.FileName == null) continue;
				
				SearchResultMatch res = new SimpleSearchResultMatch(ClassNode.GetText(derivedClass), new TextLocation(derivedClass.Region.BeginColumn - 1, derivedClass.Region.BeginLine - 1));
				res.ProvidedDocumentInformation = FindReferencesAndRenameHelper.GetDocumentInformation(derivedClass.CompilationUnit.FileName);
				results.Add(res);
			}
			SearchResultPanel.Instance.ShowSearchResults(new SearchResult(
				StringParser.Parse("${res:SharpDevelop.Refactoring.ClassesDerivingFrom}", new string[,] {{ "Name", c.Name }}),
				results
			));
		}
		void FindOverrides(object sender, EventArgs e)
		{
			MenuCommand item = (MenuCommand)sender;
			IMember member = (IMember)item.Tag;
			IEnumerable<IClass> derivedClasses = RefactoringService.FindDerivedClasses(member.DeclaringType, ParserService.AllProjectContents, false);
			List<SearchResultMatch> results = new List<SearchResultMatch>();
			IAmbience ambience = AmbienceService.GetCurrentAmbience();
			ambience.ConversionFlags = ConversionFlags.UseFullyQualifiedMemberNames | ConversionFlags.ShowTypeParameterList;
			foreach (IClass derivedClass in derivedClasses) {
				if (derivedClass.CompilationUnit == null) continue;
				if (derivedClass.CompilationUnit.FileName == null) continue;
				IMember m = MemberLookupHelper.FindSimilarMember(derivedClass, member);
				if (m != null && !m.Region.IsEmpty) {
					string matchText = ambience.Convert(m);
					SearchResultMatch res = new SimpleSearchResultMatch(matchText, new TextLocation(m.Region.BeginColumn - 1, m.Region.BeginLine - 1));
					res.ProvidedDocumentInformation = FindReferencesAndRenameHelper.GetDocumentInformation(m.DeclaringType.CompilationUnit.FileName);
					results.Add(res);
				}
			}
			SearchResultPanel.Instance.ShowSearchResults(new SearchResult(
				StringParser.Parse("${res:SharpDevelop.Refactoring.OverridesOf}", new string[,] {{ "Name", member.Name }}),
				results
			));
		}