add support for VB colors

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/Options/HighlightingOptions.xaml.cs

@@ -567,6 +567,14 @@ namespace ICSharpCode.AvalonEdit.AddIn.Options
 			{ "Keyword", "C#.GetSetAddRemove" },
 			{ "Keyword", "C#.TrueFalse" },
 			{ "Keyword", "C#.TypeKeywords" },
+			{ "Keyword", "VBNET.DateLiteral" },
+			{ "Keyword", "VBNET.Preprocessor" },
+			{ "Keyword", "VBNET.DataTypes" },
+			{ "Keyword", "VBNET.Operators" },
+			{ "Keyword", "VBNET.Constants" },
+			{ "Keyword", "VBNET.Keywords" },
+			{ "Keyword", "VBNET.FunctionKeywords" },
+			{ "Keyword", "VBNET.ContextKeywords" },
 			{ "Line Numbers", CustomizableHighlightingColorizer.LineNumbers },
 			{ "MarkerFormatDefinition/HighlightedReference", "" },
 			{ "Number", "C#.NumberLiteral" },

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/Highlighting/Resources/CSharp-Mode.xshd

@@ -43,7 +43,7 @@
 		<Span color="Preprocessor">
 			<Begin>\#</Begin>
 			<RuleSet name="PreprocessorSet">
-				<Span> <!-- preprocessor directives that allow comments -->
+				<Span> <!-- preprocessor directives that allows comments -->
 					<Begin fontWeight="bold">
 						(define|undef|if|elif|else|endif|line)\b
 					</Begin>