Fixed XAML parser (was adding 'null' as top-level type).

Added exception handling to CSharpSemanticHighlighter.

src/AddIns/BackendBindings/CSharpBinding/Project/Src/CSharpSemanticHighlighter.cs

@@ -36,6 +36,7 @@ namespace CSharpBinding
 		
 		List<IDocumentLine> invalidLines = new List<IDocumentLine>();
 		List<CachedLine> cachedLines = new List<CachedLine>();
+		bool hasCrashed;
 		
 		int lineNumber;
 		HighlightedLine line;
@@ -184,6 +185,10 @@ namespace CSharpBinding
 		public HighlightedLine HighlightLine(int lineNumber)
 		{
 			IDocumentLine documentLine = textEditor.Document.GetLineByNumber(lineNumber);
+			if (hasCrashed) {
+				// don't highlight anymore after we've crashed
+				return new HighlightedLine(textEditor.Document, documentLine);
+			}
 			ITextSourceVersion newVersion = textEditor.Document.Version;
 			CachedLine cachedLine = null;
 			for (int i = 0; i < cachedLines.Count; i++) {
@@ -225,7 +230,12 @@ namespace CSharpBinding
 			HighlightedLine line = new HighlightedLine(textEditor.Document, documentLine);
 			this.line = line;
 			this.lineNumber = lineNumber;
+			try {
 				parseInfo.CompilationUnit.AcceptVisitor(this);
+			} catch (Exception ex) {
+				hasCrashed = true;
+				throw new ApplicationException("Error highlighting line " + lineNumber, ex);
+			}
 			this.line = null;
 			this.resolver = null;
 			Debug.WriteLine("Semantic highlighting for line {0} - added {1} sections", lineNumber, line.Sections.Count);

src/AddIns/BackendBindings/XamlBinding/XamlBinding/XamlParsedFile.cs

@@ -43,7 +43,10 @@ namespace ICSharpCode.XamlBinding
 			file.errors.AddRange(document.SyntaxErrors.Select(err => new Error(ErrorType.Error, err.Description)));
 			var visitor = new XamlDocumentVisitor(file, fileContent);
 			visitor.VisitDocument(document);
+			if (visitor.TypeDefinition != null)
 				file.topLevel = new[] { visitor.TypeDefinition };
+			else
+				file.topLevel = new IUnresolvedTypeDefinition[0];
 			
 			file.lastWriteTime = DateTime.UtcNow;
 			return file;

src/Main/Base/Project/Src/Services/RefactoringService/Reference.cs

@@ -15,7 +15,6 @@ namespace ICSharpCode.SharpDevelop.Refactoring
 	/// </summary>
 	public class Reference : SearchResultMatch
 	{
-		DomRegion region;
 		ResolveResult resolveResult;
 		
 		public Reference(DomRegion region, ResolveResult resolveResult, int offset, int length, HighlightedInlineBuilder builder)

src/Main/SharpDevelop/Parser/ParserService.cs

@@ -84,15 +84,6 @@ namespace ICSharpCode.SharpDevelop.Parser
 		}
 		#endregion
 		
-		#region Load Solution Projects Thread
-		public bool LoadSolutionProjectsThreadRunning {
-			get { return false; }
-		}
-		
-		public event EventHandler LoadSolutionProjectsThreadStarted;
-		public event EventHandler LoadSolutionProjectsThreadEnded;
-		#endregion
-		
 		#region Compilation
 		public ICompilation GetCompilation(IProject project)
 		{