public ICompletionDataList HandleKeywordCompletion (CodeCompletionContext completionContext, ExpressionResult result, int wordStart, string word)
		{
			if (stateTracker.Engine.IsInsideDocLineComment || stateTracker.Engine.IsInsideOrdinaryCommentOrString)
				return null;
			DomLocation location = new DomLocation (completionContext.TriggerLine, completionContext.TriggerLineOffset);
			switch (word) {
			case "using":
				if (result.ExpressionContext != ExpressionContext.NamespaceNameExcepted)
					return null;
				return CreateCompletionData (location, new NamespaceResolveResult (""), result, null);
			case "namespace":
				result.ExpressionContext = ExpressionContext.NamespaceNameExcepted;
				return CreateCompletionData (location, new NamespaceResolveResult (""), result, null);
			case "case":
				return CreateCaseCompletionData (location, result);
			case ",":
			case ":":
				if (result.ExpressionContext == ExpressionContext.InheritableType) {
					IType cls = NRefactoryResolver.GetTypeAtCursor (Document.CompilationUnit, Document.FileName, new DomLocation (completionContext.TriggerLine, completionContext.TriggerLineOffset));
					CompletionDataList completionList = new ProjectDomCompletionDataList ();
					List<string> namespaceList = GetUsedNamespaces ();
					CSharpTextEditorCompletion.CompletionDataCollector col = new CSharpTextEditorCompletion.CompletionDataCollector (dom, completionList, Document.CompilationUnit, null, location);
					bool isInterface = false;
					HashSet<string> baseTypeNames = new HashSet<string> ();
					if (cls != null) {
						baseTypeNames.Add (cls.Name);
						if (cls.ClassType == ClassType.Struct)
							isInterface = true;
					}
					int tokenIndex = completionContext.TriggerOffset;

										// Search base types " : [Type1, ... ,TypeN,] <Caret>"
					string token = null;
					do {
						token = GetPreviousToken (ref tokenIndex, false);
						if (string.IsNullOrEmpty (token))
							break;
						token = token.Trim ();
						if (Char.IsLetterOrDigit (token[0]) || token[0] == '_') {
							IType baseType = dom.SearchType (Document.CompilationUnit, Document.CompilationUnit, token);
							if (baseType != null) {
								if (baseType.ClassType != ClassType.Interface)
									isInterface = true;
								baseTypeNames.Add (baseType.Name);
							}
						}
					} while (token != ":");
					foreach (object o in dom.GetNamespaceContents (namespaceList, true, true)) {
						IType type = o as IType;
						if (type != null && (type.IsStatic || type.IsSealed || baseTypeNames.Contains (type.Name) || isInterface && type.ClassType != ClassType.Interface)) {
							continue;
						}
						if (o is Namespace && !namespaceList.Any (ns => ns.StartsWith (((Namespace)o).FullName)))
							continue;
						col.Add (o);
					}
					// Add inner classes
					Stack<IType> innerStack = new Stack<IType> ();
					innerStack.Push (cls);
					while (innerStack.Count > 0) {
						IType curType = innerStack.Pop ();
						if (curType == null)
							continue;
						foreach (IType innerType in curType.InnerTypes) {
							if (innerType != cls)
								// don't add the calling class as possible base type
								col.Add (innerType);
						}
						if (curType.DeclaringType != null)
							innerStack.Push (curType.DeclaringType);
					}
					return completionList;
				}
				break;
			case "is":
			case "as":
				
				{
					CompletionDataList completionList = new ProjectDomCompletionDataList ();
					ExpressionResult expressionResult = FindExpression (dom, completionContext, wordStart - textEditorData.Caret.Offset);
					NRefactoryResolver resolver = CreateResolver ();
					ResolveResult resolveResult = resolver.Resolve (expressionResult, new DomLocation (completionContext.TriggerLine, completionContext.TriggerLineOffset));
					if (resolveResult != null && resolveResult.ResolvedType != null) {
						CompletionDataCollector col = new CompletionDataCollector (dom, completionList, Document.CompilationUnit, resolver.CallingType, location);
						IType foundType = null;
						if (word == "as") {
							ExpressionContext exactContext = new NewCSharpExpressionFinder (dom).FindExactContextForAsCompletion (textEditorData, Document.CompilationUnit, Document.FileName, resolver.CallingType);
							if (exactContext is ExpressionContext.TypeExpressionContext) {
								foundType = resolver.SearchType (((ExpressionContext.TypeExpressionContext)exactContext).Type);
								AddAsCompletionData (col, foundType);
							}
						}
					
						if (foundType == null)
							foundType = resolver.SearchType (resolveResult.ResolvedType);
					
						if (foundType != null) {
							if (foundType.ClassType == ClassType.Interface)
								foundType = resolver.SearchType (DomReturnType.Object);
						
//.........这里部分代码省略.........

		ICompletionDataList CreateCaseCompletionData (DomLocation location, ExpressionResult expressionResult)
		{
			NRefactoryResolver resolver = CreateResolver ();
			
			resolver.SetupResolver (location);
			
			SwitchFinder switchFinder = new SwitchFinder (location);
			if (resolver.MemberCompilationUnit != null)
				switchFinder.VisitCompilationUnit (resolver.MemberCompilationUnit, null);
			CompletionDataList result = new ProjectDomCompletionDataList ();
			if (switchFinder.SwitchStatement == null)
				return result;
			ResolveResult resolveResult = resolver.ResolveExpression (switchFinder.SwitchStatement.SwitchExpression, location);
			IType type = dom.GetType (resolveResult.ResolvedType);
			if (type != null && type.ClassType == ClassType.Enum) {
				OutputFlags flags = OutputFlags.None;
				var declaringType = resolver.CallingType;
				if (declaringType != null && dom != null) {
					foreach (IType t in new List<IType>(dom.GetInheritanceTree (declaringType))) {
						if (t.SearchMember (type.Name, true).Any (m => m.MemberType != MonoDevelop.Projects.Dom.MemberType.Type)) {
							flags |= OutputFlags.UseFullName;
							break;
						}
					}
				}
//				if (!foundType && (NamePrefix.Length == 0 || !type.Namespace.StartsWith (NamePrefix)) && !type.Namespace.EndsWith ("." + NamePrefix) && type.DeclaringType == null && NamePrefix != null && !NamePrefix.Contains ("::"))
//					flags |= OutputFlags.UseFullName;
				CompletionDataCollector cdc = new CompletionDataCollector (dom, result, Document.CompilationUnit, resolver.CallingType, location);
				cdc.Add (type, flags);
			}
			return result;
		}

		CompletionDataList GetDefineCompletionData ()
		{
			if (Document.Project == null)
				return null;

			Dictionary<string, string> symbols = new Dictionary<string, string> ();
			CompletionDataList cp = new ProjectDomCompletionDataList ();
			foreach (DotNetProjectConfiguration conf in Document.Project.Configurations) {
				CSharpCompilerParameters cparams = conf.CompilationParameters as CSharpCompilerParameters;
				if (cparams != null) {
					string[] syms = cparams.DefineSymbols.Split (';');
					foreach (string s in syms) {
						string ss = s.Trim ();
						if (ss.Length > 0 && !symbols.ContainsKey (ss)) {
							symbols [ss] = ss;
							cp.Add (ss, "md-literal");
						}
					}
				}
			}
			return cp;
		}

		CompletionDataList GetPartialCompletionData (CodeCompletionContext ctx, IType type, string modifiers)
		{
			CompletionDataList result = new ProjectDomCompletionDataList ();

			CompoundType partialType = dom.GetType (type.FullName) as CompoundType;
			if (partialType != null) {
				List<IMethod> methods = new List<IMethod> ();
				// gather all partial methods without implementation
				foreach (IType part in partialType.Parts) {
					if (part.Location == type.Location && part.CompilationUnit.FileName == type.CompilationUnit.FileName)
						continue;
					foreach (IMethod method in part.Methods) {
						if (method.IsPartial && method.BodyRegion.End.Line == 0 && !ContainsDeclaration (type, method)) {
							methods.Add (method);
						}
					}
				}

				// now filter all methods that are implemented in the compound class
				foreach (IType part in partialType.Parts) {
					if (part.Location == type.Location && part.CompilationUnit.FileName == type.CompilationUnit.FileName)
						continue;
					for (int i = 0; i < methods.Count; i++) {
						IMethod curMethod = methods[i];
						IMethod method = GetDeclaration (part, curMethod);
						if (method != null && method.BodyRegion.End.Line != 0) {
							methods.RemoveAt (i);
							i--;
							continue;
						}
					}
				}

				foreach (IMethod method in methods) {
					NewOverrideCompletionData data = new NewOverrideCompletionData (dom, textEditorData, ctx.TriggerOffset, type, method);
					data.GenerateBody = false;
					result.Add (data);
				}
				
			}
			return result;
		}

		CompletionDataList CreateCtrlSpaceCompletionData (CodeCompletionContext ctx, ExpressionResult expressionResult)
		{
			NRefactoryResolver resolver = CreateResolver ();
			DomLocation cursorLocation = new DomLocation (ctx.TriggerLine, ctx.TriggerLineOffset);
			resolver.SetupResolver (cursorLocation);
			CompletionDataList result = new ProjectDomCompletionDataList ();
			CompletionDataCollector col = new CompletionDataCollector (dom, result, Document.CompilationUnit, resolver.CallingType, cursorLocation);
			
			if (expressionResult == null) {
				AddPrimitiveTypes (col);
				resolver.AddAccessibleCodeCompletionData (ExpressionContext.Global, col);
			} else if (expressionResult.ExpressionContext == ExpressionContext.TypeDeclaration) {
				AddPrimitiveTypes (col);
				AddNRefactoryKeywords (col, ICSharpCode.NRefactory.Parser.CSharp.Tokens.TypeLevel);
				resolver.AddAccessibleCodeCompletionData (expressionResult.ExpressionContext, col);
			} else if (expressionResult.ExpressionContext == ExpressionContext.InterfaceDeclaration) {
				AddPrimitiveTypes (col);
				AddNRefactoryKeywords (col, ICSharpCode.NRefactory.Parser.CSharp.Tokens.InterfaceLevel);
				resolver.AddAccessibleCodeCompletionData (expressionResult.ExpressionContext, col);
			} else if (expressionResult.ExpressionContext == ExpressionContext.MethodBody) {
				col.Add ("global", "md-keyword");
				col.Add ("var", "md-keyword");
				AddNRefactoryKeywords (col, ICSharpCode.NRefactory.Parser.CSharp.Tokens.StatementStart);
				AddPrimitiveTypes (col);
				resolver.AddAccessibleCodeCompletionData (expressionResult.ExpressionContext, col);
			} else if (expressionResult.ExpressionContext == ExpressionContext.InterfacePropertyDeclaration) {
				col.Add ("get", "md-keyword");
				col.Add ("set", "md-keyword");
			} else if (expressionResult.ExpressionContext == ExpressionContext.ConstraintsStart) {
				col.Add ("where", "md-keyword");
			} else if (expressionResult.ExpressionContext == ExpressionContext.Constraints) {
				col.Add ("new", "md-keyword");
				col.Add ("class", "md-keyword");
				col.Add ("struct", "md-keyword");
				AddPrimitiveTypes (col);
				resolver.AddAccessibleCodeCompletionData (expressionResult.ExpressionContext, col);
			} else if (expressionResult.ExpressionContext == ExpressionContext.Attribute) {
				col.Add ("assembly", "md-keyword");
				col.Add ("module", "md-keyword");
				col.Add ("type", "md-keyword");
				col.Add ("method", "md-keyword");
				col.Add ("field", "md-keyword");
				col.Add ("property", "md-keyword");
				col.Add ("event", "md-keyword");
				col.Add ("param", "md-keyword");
				col.Add ("return", "md-keyword");
				resolver.AddAccessibleCodeCompletionData (expressionResult.ExpressionContext, col);
			} else if (expressionResult.ExpressionContext == ExpressionContext.BaseConstructorCall) {
				col.Add ("this", "md-keyword");
				col.Add ("base", "md-keyword");
			} else if (expressionResult.ExpressionContext == ExpressionContext.ParameterType || expressionResult.ExpressionContext == ExpressionContext.FirstParameterType) {
				col.Add ("ref", "md-keyword");
				col.Add ("out", "md-keyword");
				col.Add ("params", "md-keyword");
				// C# 3.0 extension method
				if (expressionResult.ExpressionContext == ExpressionContext.FirstParameterType)
					col.Add ("this", "md-keyword");
				AddPrimitiveTypes (col);
				resolver.AddAccessibleCodeCompletionData (expressionResult.ExpressionContext, col);
			} else if (expressionResult.ExpressionContext == ExpressionContext.PropertyDeclaration) {
				AddNRefactoryKeywords (col, ICSharpCode.NRefactory.Parser.CSharp.Tokens.InPropertyDeclaration);
			} else if (expressionResult.ExpressionContext == ExpressionContext.EventDeclaration) {
				col.Add ("add", "md-keyword");
				col.Add ("remove", "md-keyword");
			} //else if (expressionResult.ExpressionContext == ExpressionContext.FullyQualifiedType) {} 
			else if (expressionResult.ExpressionContext == ExpressionContext.Default) {
				col.Add ("global", "md-keyword");
				col.Add ("var", "md-keyword");
				AddPrimitiveTypes (col);
				AddNRefactoryKeywords (col, ICSharpCode.NRefactory.Parser.CSharp.Tokens.ExpressionStart);
				AddNRefactoryKeywords (col, ICSharpCode.NRefactory.Parser.CSharp.Tokens.ExpressionContent);
				resolver.AddAccessibleCodeCompletionData (expressionResult.ExpressionContext, col);
			} else if (expressionResult.ExpressionContext == ExpressionContext.Global) {
				AddNRefactoryKeywords (col, ICSharpCode.NRefactory.Parser.CSharp.Tokens.GlobalLevel);
				CodeTemplateService.AddCompletionDataForMime ("text/x-csharp", result);
			} else if (expressionResult.ExpressionContext == ExpressionContext.ObjectInitializer) {
				ExpressionContext exactContext = new NewCSharpExpressionFinder (dom).FindExactContextForObjectInitializer (textEditorData, resolver.Unit, Document.FileName, resolver.CallingType);
				if (exactContext is ExpressionContext.TypeExpressionContext) {
					IReturnType objectInitializer = ((ExpressionContext.TypeExpressionContext)exactContext).UnresolvedType;
					if (objectInitializer.ArrayDimensions > 0 || objectInitializer.PointerNestingLevel > 0) {
						col.Add ("global", "md-keyword");
						col.Add ("new", "md-keyword");
						AddPrimitiveTypes (col);
						resolver.AddAccessibleCodeCompletionData (expressionResult.ExpressionContext, col);
						return result;
					}
						
					IType foundType = resolver.SearchType (objectInitializer);
					if (foundType == null)
						foundType = dom.GetType (objectInitializer);
					
					if (foundType != null) {
						bool includeProtected = DomType.IncludeProtected (dom, foundType, resolver.CallingType);
						foreach (IType type in dom.GetInheritanceTree (foundType)) {
							foreach (IProperty property in type.Properties) {
								if (property.IsAccessibleFrom (dom, resolver.CallingType, resolver.CallingMember, includeProtected)) {
									col.Add (property);
								}
							}
							foreach (var field in type.Fields) {
//.........这里部分代码省略.........

		CompletionDataList GetOverrideCompletionData (CodeCompletionContext ctx, IType type, string modifiers)
		{
			CompletionDataList result = new ProjectDomCompletionDataList ();
			Dictionary<string, bool> alreadyInserted = new Dictionary<string, bool> ();
			bool addedVirtuals = false;
			foreach (IReturnType baseType in type.BaseTypes) {
				AddVirtuals (ctx, alreadyInserted, result, type, modifiers, baseType);
				addedVirtuals = true;
			}
			if (!addedVirtuals)
				AddVirtuals (ctx, alreadyInserted, result, type, modifiers, DomReturnType.Object);
			return result;
		}

		public override ICompletionDataList HandleCodeCompletion (CodeCompletionContext completionContext, char completionChar, ref int triggerWordLength)
		{
			if (textEditorData.CurrentMode is CompletionTextLinkMode) {
				if (!((CompletionTextLinkMode)textEditorData.CurrentMode).TriggerCodeCompletion)
					return null;
			} else if (textEditorData.CurrentMode is Mono.TextEditor.TextLinkEditMode) {
				return null;
			}

	//		IDisposable timer = null;
		try {
			if (dom == null /*|| Document.CompilationUnit == null*/)
				return null;
			if (completionChar != '#' && stateTracker.Engine.IsInsidePreprocessorDirective)
				return null;
		//	timer = Counters.ResolveTime.BeginTiming ();
			DomLocation location = new DomLocation (completionContext.TriggerLine, completionContext.TriggerLineOffset - 1);
			stateTracker.UpdateEngine ();
			ExpressionResult result;
			int cursor, newCursorOffset = 0;
			switch (completionChar) {
			case ':':
			case '.':
				if (stateTracker.Engine.IsInsideDocLineComment || stateTracker.Engine.IsInsideOrdinaryCommentOrString)
					return null;
				result = FindExpression (dom, completionContext);
				if (result == null || result.Expression == null)
					return null;
				int idx = result.Expression.LastIndexOf ('.');
				if (idx > 0)
					result.Expression = result.Expression.Substring (0, idx);
				// don't parse expressions that end with more than 1 dot - see #646820
				if (result.Expression.EndsWith ("."))
					return null;
				NRefactoryResolver resolver = CreateResolver ();
				ResolveResult resolveResult = resolver.Resolve (result, location);
				if (resolver.ResolvedExpression is ICSharpCode.NRefactory.Ast.PrimitiveExpression) {
					ICSharpCode.NRefactory.Ast.PrimitiveExpression pex = (ICSharpCode.NRefactory.Ast.PrimitiveExpression)resolver.ResolvedExpression;
					if (!tryToForceCompletion && !(pex.Value is string || pex.Value is char || pex.Value is bool))
						return null;
				}
					
				return CreateCompletionData (location, resolveResult, result, resolver);
			case '#':
				if (stateTracker.Engine.IsInsidePreprocessorDirective) 
					return GetDirectiveCompletionData ();
				return null;
			case '>':
				cursor = textEditorData.IsSomethingSelected ? textEditorData.SelectionRange.Offset : textEditorData.Caret.Offset;
				
				if (stateTracker.Engine.IsInsideDocLineComment) {
					string lineText = textEditorData.GetLineText (completionContext.TriggerLine);
					int startIndex = Math.Min (completionContext.TriggerLineOffset - 1, lineText.Length - 1);
					
					while (startIndex >= 0 && lineText[startIndex] != '<') {
						--startIndex;
						if (lineText[startIndex] == '/') { // already closed.
							startIndex = -1;
							break;
						}
					}
					
					if (startIndex >= 0) {
						int endIndex = startIndex;
						while (endIndex <= completionContext.TriggerLineOffset && endIndex < lineText.Length && !Char.IsWhiteSpace (lineText[endIndex])) {
							endIndex++;
						}
						string tag = endIndex - startIndex - 1 > 0 ? lineText.Substring (startIndex + 1, endIndex - startIndex - 2) : null;
						if (!String.IsNullOrEmpty (tag) && commentTags.IndexOf (tag) >= 0) {
							textEditorData.Insert (cursor, "</" + tag + ">");
							textEditorData.Caret.Offset = cursor; 
							return null;
						}
					}
				}
				return null;
/* Disabled because it gives problems when declaring arrays - for example string [] should not pop up code completion.
 			case '[':
				if (stateTracker.Engine.IsInsideDocLineComment || stateTracker.Engine.IsInsideOrdinaryCommentOrString)
					return null;
				result = FindExpression (dom, completionContext);
				if (result.ExpressionContext == ExpressionContext.Attribute)
					return CreateCtrlSpaceCompletionData (completionContext, result);
				return null;*/
			case '<':
				if (stateTracker.Engine.IsInsideDocLineComment) 
					return GetXmlDocumentationCompletionData ();
				return null;
			case '(':
				if (stateTracker.Engine.IsInsideDocLineComment || stateTracker.Engine.IsInsideOrdinaryCommentOrString)
					return null;
				result = FindExpression (dom, completionContext, -1);
				if (result == null || result.Expression == null)
					return null;
				resolver = CreateResolver ();
				resolveResult = resolver.Resolve (result, new DomLocation (completionContext.TriggerLine, completionContext.TriggerLineOffset - 2));
				
				if (resolveResult != null && resolver.ResolvedExpression is ICSharpCode.NRefactory.Ast.TypeOfExpression) {
					CompletionDataList completionList = new ProjectDomCompletionDataList ();
					
//.........这里部分代码省略.........

		CompletionDataList CreateTypeCompletionData (DomLocation location, IType callingType, ExpressionContext context, IReturnType returnType, IReturnType returnTypeUnresolved)
		{
			CompletionDataList result = new ProjectDomCompletionDataList ();
			// "var o = new " needs special treatment.
			if (returnType == null && returnTypeUnresolved != null && returnTypeUnresolved.FullName == "var")
				returnType = returnTypeUnresolved = DomReturnType.Object;

			//	ExpressionContext.TypeExpressionContext tce = context as ExpressionContext.TypeExpressionContext;

			CompletionDataCollector col = new CompletionDataCollector (dom, result, Document.CompilationUnit, callingType, location);
			IType type = null;
			if (returnType != null)
				type = dom.GetType (returnType);
			if (type == null)
				type = dom.SearchType (Document.CompilationUnit, (MonoDevelop.Projects.Dom.INode)Document.CompilationUnit ?? callingType, returnTypeUnresolved);
			
			// special handling for nullable types: Bug 674516 - new completion for nullables should not include "Nullable"
			if (type is InstantiatedType && ((InstantiatedType)type).UninstantiatedType.FullName == "System.Nullable" && ((InstantiatedType)type).GenericParameters.Count == 1) {
				var genericParameter = ((InstantiatedType)type).GenericParameters[0];
				returnType = returnTypeUnresolved = Document.CompilationUnit.ShortenTypeName (genericParameter, location);
				type = dom.SearchType (Document.CompilationUnit, (MonoDevelop.Projects.Dom.INode)Document.CompilationUnit ?? callingType, genericParameter);
			}
			
			if (type == null || !(type.IsAbstract || type.ClassType == ClassType.Interface)) {
				if (type == null || type.ConstructorCount == 0 || type.Methods.Any (c => c.IsConstructor && c.IsAccessibleFrom (dom, callingType, type, callingType != null && dom.GetInheritanceTree (callingType).Any (x => x.FullName == type.FullName)))) {
					if (returnTypeUnresolved != null) {
						col.FullyQualify = true;
						CompletionData unresovedCompletionData = col.Add (returnTypeUnresolved);
						col.FullyQualify = false;
						// don't set default completion string for arrays, since it interferes with: 
						// string[] arr = new string[] vs new { "a"}
						if (returnTypeUnresolved.ArrayDimensions == 0)
							result.DefaultCompletionString = StripGenerics (unresovedCompletionData.CompletionText);
					} else {
						CompletionData unresovedCompletionData = col.Add (returnType);
						if (returnType.ArrayDimensions == 0)
							result.DefaultCompletionString = StripGenerics (unresovedCompletionData.CompletionText);
					}
				}
			}
			
			//				if (tce != null && tce.Type != null) {
			//					result.DefaultCompletionString = StripGenerics (col.AddCompletionData (result, tce.Type).CompletionString);
			//				} 
			//			else {
			//			}
			if (type == null)
				return result;
			HashSet<string> usedNamespaces = new HashSet<string> (GetUsedNamespaces ());
			if (type.FullName == DomReturnType.Object.FullName) 
				AddPrimitiveTypes (col);
			
			foreach (IType curType in dom.GetSubclasses (type)) {
				if (context != null && context.FilterEntry (curType))
					continue;
				if ((curType.TypeModifier & TypeModifier.HasOnlyHiddenConstructors) == TypeModifier.HasOnlyHiddenConstructors)
					continue;
				if (usedNamespaces.Contains (curType.Namespace)) {
					if (curType.ConstructorCount > 0) {
						if (!(curType.Methods.Any (c => c.IsConstructor && c.IsAccessibleFrom (dom, curType, callingType, callingType != null && dom.GetInheritanceTree (callingType).Any (x => x.FullName == curType.FullName)))))
							continue;
					}
					col.Add (curType);
				} else {
					string nsName = curType.Namespace;
					int idx = nsName.IndexOf ('.');
					if (idx >= 0)
						nsName = nsName.Substring (0, idx);
					col.Add (new Namespace (nsName));
				}
			}
			
			// add aliases
			if (returnType != null) {
				foreach (IUsing u in Document.CompilationUnit.Usings) {
					foreach (KeyValuePair<string, IReturnType> alias in u.Aliases) {
						if (alias.Value.ToInvariantString () == returnType.ToInvariantString ())
							result.Add (alias.Key, "md-class");
					}
				}
			}
			return result;
		}

		ICompletionDataList CreateCompletionData (DomLocation location, ResolveResult resolveResult, 
		                                          ExpressionResult expressionResult, NRefactoryResolver resolver)
		{
			if (resolveResult == null || expressionResult == null || dom == null)
				return null;
			CompletionDataList result = new ProjectDomCompletionDataList ();
			IEnumerable<object> objects = resolveResult.CreateResolveResult (dom, resolver != null ? resolver.CallingMember : null);
			CompletionDataCollector col = new CompletionDataCollector (dom, result, Document.CompilationUnit, resolver != null ? resolver.CallingType : null, location);
			col.HideExtensionParameter = !resolveResult.StaticResolve;
			col.NamePrefix = expressionResult.Expression;
			bool showOnlyTypes = expressionResult.Contexts.Any (ctx => ctx == ExpressionContext.InheritableType || ctx == ExpressionContext.Constraints);
			if (objects != null) {
				foreach (object obj in objects) {
					if (expressionResult.ExpressionContext != null && expressionResult.ExpressionContext.FilterEntry (obj))
						continue;
					if (expressionResult.ExpressionContext == ExpressionContext.NamespaceNameExcepted && !(obj is Namespace))
						continue;
					if (showOnlyTypes && !(obj is IType))
						continue;
					CompletionData data = col.Add (obj);
					if (data != null && expressionResult.ExpressionContext == ExpressionContext.Attribute && data.CompletionText != null && data.CompletionText.EndsWith ("Attribute")) {
						string newText = data.CompletionText.Substring (0, data.CompletionText.Length - "Attribute".Length);
						data.SetText (newText);
					}
				}
			}
			
			return result;
		}

		public CompletionDataList CreateParameterCompletion (NRefactoryResolver resolver, DomLocation location, ExpressionContext context, IEnumerable<IMethod> possibleMethods, int parameter)
		{
			CompletionDataList completionList = new ProjectDomCompletionDataList ();
			var addedEnums = new HashSet<string> ();
			var addedDelegates = new HashSet<string> ();
			IType resolvedType = null;
			foreach (var method in possibleMethods) {
				if (method.Parameters.Count <= parameter)
					continue;
				resolvedType = dom.GetType (method.Parameters [parameter].ReturnType);
				if (resolvedType == null)
					continue;
				switch (resolvedType.ClassType) {
				case MonoDevelop.Projects.Dom.ClassType.Enum:
					if (addedEnums.Contains (resolvedType.DecoratedFullName))
						continue;
					addedEnums.Add (resolvedType.DecoratedFullName);
					AddEnumMembers (completionList, resolvedType);
					break;
				case MonoDevelop.Projects.Dom.ClassType.Delegate:
					if (addedDelegates.Contains (resolvedType.DecoratedFullName))
						continue;
					addedDelegates.Add (resolvedType.DecoratedFullName);
					string parameterDefinition = AddDelegateHandlers (completionList, resolvedType, false, addedDelegates.Count == 1);
					string varName = "Handle" + method.Parameters [parameter].ReturnType.Name + method.Parameters [parameter].Name;
					completionList.Add (new EventCreationCompletionData (textEditorData, varName, resolvedType, null, parameterDefinition, resolver.Unit.GetMemberAt (location), resolvedType) { AddSemicolon = false });
					break;
				}
			}
			if (addedEnums.Count + addedDelegates.Count == 0)
				return null;
			CompletionDataCollector cdc = new CompletionDataCollector (this, dom, completionList, Document.CompilationUnit, resolver.CallingType, location);
			completionList.AutoCompleteEmptyMatch = false;
			completionList.AutoSelect = false;
			resolver.AddAccessibleCodeCompletionData (ExpressionContext.MethodBody, cdc);
			if (addedDelegates.Count > 0) {
				foreach (var data in completionList) {
					if (data is MemberCompletionData) 
						((MemberCompletionData)data).IsDelegateExpected = true;
				}
			}
			return completionList;
		}

		ICompletionDataList CreateCaseCompletionData (DomLocation location, ExpressionResult expressionResult)
		{
			NRefactoryResolver resolver = CreateResolver ();
			
			resolver.SetupResolver (location);
			
			SwitchFinder switchFinder = new SwitchFinder (location);
			if (resolver.MemberCompilationUnit != null)
				switchFinder.VisitCompilationUnit (resolver.MemberCompilationUnit, null);
			CompletionDataList result = new ProjectDomCompletionDataList ();
			if (switchFinder.SwitchStatement == null)
				return result;
			ResolveResult resolveResult = resolver.ResolveExpression (switchFinder.SwitchStatement.SwitchExpression, location);
			IType type = dom.GetType (resolveResult.ResolvedType);
			if (type != null && type.ClassType == ClassType.Enum) {
				CompletionDataCollector cdc = new CompletionDataCollector (dom, result, Document.CompilationUnit, resolver.CallingType, location);
				cdc.Add (type);
			}
			return result;
		}

		public CompletionDataList CreatePossibleEnumCompletion (NRefactoryResolver resolver, DomLocation location, ExpressionContext context, IEnumerable<IMethod> possibleMethods, int parameter)
		{
			CompletionDataList completionList = new ProjectDomCompletionDataList ();
			var addedEnums = new HashSet<string> ();
			IType resolvedType = null;
			foreach (var method in possibleMethods) {
				if (method.Parameters.Count <= parameter)
					continue;
				resolvedType = dom.GetType (method.Parameters [parameter].ReturnType);
				if (resolvedType == null || resolvedType.ClassType != ClassType.Enum)
					continue;
				if (addedEnums.Contains (resolvedType.DecoratedFullName))
					continue;
				addedEnums.Add (resolvedType.DecoratedFullName);
				AddEnumMembers (completionList, resolvedType);
			}
			if (addedEnums.Count == 0)
				return null;
			CompletionDataCollector cdc = new CompletionDataCollector (dom, completionList, Document.CompilationUnit, resolver.CallingType, location);
			completionList.AutoCompleteEmptyMatch = false;
			//completionList.AutoSelect = false;
			resolver.AddAccessibleCodeCompletionData (context, cdc);
			return completionList;
		}