diff --git a/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/AbstractDesignerGenerator.cs b/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/AbstractDesignerGenerator.cs
index 68bc29f4bf..bbd613e8c2 100644
--- a/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/AbstractDesignerGenerator.cs
+++ b/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/AbstractDesignerGenerator.cs
@@ -21,6 +21,7 @@ using ICSharpCode.SharpDevelop.DefaultEditor.Gui.Editor;
 using ICSharpCode.SharpDevelop.Dom;
 using ICSharpCode.SharpDevelop.Gui;
 using ICSharpCode.TextEditor.Document;
+using ReflectionLayer = ICSharpCode.SharpDevelop.Dom.ReflectionLayer;
 
 namespace ICSharpCode.FormsDesigner
 {
@@ -397,6 +398,32 @@ namespace ICSharpCode.FormsDesigner
 			return true;
 		}
 		
+		/// <summary>
+		/// Gets a method implementing the signature specified by the event descriptor
+		/// </summary>
+		protected IMethod ConvertDescriptorToDom(EventDescriptor edesc, string methodName)
+		{
+			MethodInfo mInfo = edesc.EventType.GetMethod("Invoke");
+			DefaultMethod m = new DefaultMethod(completeClass, methodName);
+			m.ReturnType = ReflectionLayer.ReflectionReturnType.Create(m, mInfo.ReturnType, false);
+			foreach (ParameterInfo pInfo in mInfo.GetParameters()) {
+				m.Parameters.Add(new ReflectionLayer.ReflectionParameter(pInfo, m));
+			}
+			return m;
+		}
+		
+		/// <summary>
+		/// Gets a method implementing the signature specified by the event descriptor
+		/// </summary>
+		protected ICSharpCode.NRefactory.Ast.MethodDeclaration
+			ConvertDescriptorToNRefactory(EventDescriptor edesc, string methodName)
+		{
+			return ICSharpCode.SharpDevelop.Dom.Refactoring.CodeGenerator.ConvertMember(
+				ConvertDescriptorToDom(edesc, methodName),
+				new ClassFinder(c, c.BodyRegion.BeginLine + 1, 1)
+			) as ICSharpCode.NRefactory.Ast.MethodDeclaration;
+		}
+		
 		protected virtual int GetEventHandlerInsertionLine(IClass c)
 		{
 			return c.Region.EndLine;
diff --git a/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/CSharpDesignerGenerator.cs b/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/CSharpDesignerGenerator.cs
index b763f54de5..71cca630ff 100644
--- a/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/CSharpDesignerGenerator.cs
+++ b/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/CSharpDesignerGenerator.cs
@@ -13,6 +13,8 @@ using System.Text;
 
 using ICSharpCode.Core;
 using ICSharpCode.SharpDevelop.Dom;
+using ICSharpCode.NRefactory.Ast;
+using ICSharpCode.NRefactory.PrettyPrinter;
 
 namespace ICSharpCode.FormsDesigner
 {
@@ -68,35 +70,14 @@ namespace ICSharpCode.FormsDesigner
 			return r.BeginLine + 2;
 		}
 		
-		protected static string GenerateParams(EventDescriptor edesc, bool paramNames)
+		protected string GenerateParams(EventDescriptor edesc, bool paramNames)
 		{
-			System.Type type =  edesc.EventType;
-			MethodInfo mInfo = type.GetMethod("Invoke");
-			string param = "";
-			IAmbience csa = null;
-			try {
-				csa = (IAmbience)AddInTree.BuildItem("/SharpDevelop/Workbench/Ambiences/C#", null);
-			} catch (TreePathNotFoundException) {
-				LoggingService.Warn("C# ambience not found");
+			CSharpOutputVisitor v = new CSharpOutputVisitor();
+			MethodDeclaration md = ConvertDescriptorToNRefactory(edesc, "name");
+			if (md != null) {
+				v.AppendCommaSeparatedList(md.Parameters);
 			}
-			
-			for (int i = 0; i < mInfo.GetParameters().Length; ++i)  {
-				ParameterInfo pInfo  = mInfo.GetParameters()[i];
-				
-				string typeStr = pInfo.ParameterType.ToString();
-				if (csa != null) {
-					typeStr = csa.GetIntrinsicTypeName(typeStr);
-				}
-				param += typeStr;
-				if (paramNames == true) {
-					param += " ";
-					param += pInfo.Name;
-				}
-				if (i + 1 < mInfo.GetParameters().Length) {
-					param += ", ";
-				}
-			}
-			return param;
+			return v.Text;
 		}
 	}
 }
diff --git a/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/VBNetDesignerGenerator.cs b/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/VBNetDesignerGenerator.cs
index a1e04c2ea3..021df0c689 100644
--- a/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/VBNetDesignerGenerator.cs
+++ b/src/AddIns/DisplayBindings/FormsDesigner/Project/Src/DesignerGenerator/VBNetDesignerGenerator.cs
@@ -12,6 +12,8 @@ using System.Text;
 
 using ICSharpCode.Core;
 using ICSharpCode.SharpDevelop.Dom;
+using ICSharpCode.NRefactory.Ast;
+using ICSharpCode.NRefactory.PrettyPrinter;
 
 namespace ICSharpCode.FormsDesigner
 {
@@ -45,34 +47,14 @@ namespace ICSharpCode.FormsDesigner
 			return b.ToString();
 		}
 		
-		protected static string GenerateParams(EventDescriptor edesc)
+		protected string GenerateParams(EventDescriptor edesc)
 		{
-			System.Type type =  edesc.EventType;
-			MethodInfo mInfo = type.GetMethod("Invoke");
-			string param = "";
-			IAmbience csa = null;
-			try {
-				csa = (IAmbience)AddInTree.BuildItem("/SharpDevelop/Workbench/Ambiences/VBNet", null);
-			} catch (TreePathNotFoundException) {
-				LoggingService.Warn("VB ambience not found");
+			VBNetOutputVisitor v = new VBNetOutputVisitor();
+			MethodDeclaration md = ConvertDescriptorToNRefactory(edesc, "name");
+			if (md != null) {
+				v.AppendCommaSeparatedList(md.Parameters);
 			}
-			
-			for (int i = 0; i < mInfo.GetParameters().Length; ++i)  {
-				ParameterInfo pInfo  = mInfo.GetParameters()[i];
-				
-				param += pInfo.Name;
-				param += " As ";
-				
-				string typeStr = pInfo.ParameterType.ToString();
-				if (csa != null) {
-					typeStr = csa.GetIntrinsicTypeName(typeStr);
-				}
-				param += typeStr;
-				if (i + 1 < mInfo.GetParameters().Length) {
-					param += ", ";
-				}
-			}
-			return param;
+			return v.Text;
 		}
 	}
 }
diff --git a/src/Libraries/NRefactory/Project/Src/PrettyPrinter/CSharp/CSharpOutputVisitor.cs b/src/Libraries/NRefactory/Project/Src/PrettyPrinter/CSharp/CSharpOutputVisitor.cs
index fa319ac673..2bbdcf11da 100644
--- a/src/Libraries/NRefactory/Project/Src/PrettyPrinter/CSharp/CSharpOutputVisitor.cs
+++ b/src/Libraries/NRefactory/Project/Src/PrettyPrinter/CSharp/CSharpOutputVisitor.cs
@@ -2472,11 +2472,12 @@ namespace ICSharpCode.NRefactory.PrettyPrinter
 			}
 		}
 		
-		void AppendCommaSeparatedList(IList list)
+		public void AppendCommaSeparatedList<T>(ICollection<T> list) where T : class, INode
 		{
 			if (list != null) {
-				for (int i = 0; i < list.Count; ++i) {
-					nodeTracker.TrackedVisit(((INode)list[i]), null);
+				int i = 0;
+				foreach (T node in list) {
+					nodeTracker.TrackedVisit(node, null);
 					if (i + 1 < list.Count) {
 						PrintFormattedComma();
 					}
@@ -2484,6 +2485,7 @@ namespace ICSharpCode.NRefactory.PrettyPrinter
 						outputFormatter.NewLine();
 						outputFormatter.Indent();
 					}
+					i++;
 				}
 			}
 		}
diff --git a/src/Libraries/NRefactory/Project/Src/PrettyPrinter/VBNet/VBNetOutputVisitor.cs b/src/Libraries/NRefactory/Project/Src/PrettyPrinter/VBNet/VBNetOutputVisitor.cs
index 246f430ddb..f79b2348aa 100644
--- a/src/Libraries/NRefactory/Project/Src/PrettyPrinter/VBNet/VBNetOutputVisitor.cs
+++ b/src/Libraries/NRefactory/Project/Src/PrettyPrinter/VBNet/VBNetOutputVisitor.cs
@@ -2646,11 +2646,12 @@ namespace ICSharpCode.NRefactory.PrettyPrinter
 			}
 		}
 		
-		void AppendCommaSeparatedList(IList list)
+		public void AppendCommaSeparatedList<T>(ICollection<T> list) where T : class, INode
 		{
 			if (list != null) {
-				for (int i = 0; i < list.Count; ++i) {
-					nodeTracker.TrackedVisit(((INode)list[i]), null);
+				int i = 0;
+				foreach (T node in list) {
+					nodeTracker.TrackedVisit(node, null);
 					if (i + 1 < list.Count) {
 						outputFormatter.PrintToken(Tokens.Comma);
 						outputFormatter.Space();
@@ -2660,6 +2661,7 @@ namespace ICSharpCode.NRefactory.PrettyPrinter
 							outputFormatter.PrintText("\t");
 						}
 					}
+					i++;
 				}
 			}
 		}
diff --git a/src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/ReflectionLayer/ReflectionParameter.cs b/src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/ReflectionLayer/ReflectionParameter.cs
index d35b3c8d73..ebcf2fa0fd 100644
--- a/src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/ReflectionLayer/ReflectionParameter.cs
+++ b/src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/ReflectionLayer/ReflectionParameter.cs
@@ -10,7 +10,7 @@ using System.Reflection;
 
 namespace ICSharpCode.SharpDevelop.Dom.ReflectionLayer
 {
-	internal class ReflectionParameter : DefaultParameter
+	public class ReflectionParameter : DefaultParameter
 	{
 		public ReflectionParameter(ParameterInfo parameterInfo, IMember member) : base(parameterInfo.Name)
 		{
diff --git a/src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/ReflectionLayer/ReflectionReturnType.cs b/src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/ReflectionLayer/ReflectionReturnType.cs
index bdfdffb08a..e2f5d064e1 100644
--- a/src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/ReflectionLayer/ReflectionReturnType.cs
+++ b/src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/ReflectionLayer/ReflectionReturnType.cs
@@ -10,7 +10,7 @@ using System.Collections.Generic;
 
 namespace ICSharpCode.SharpDevelop.Dom.ReflectionLayer
 {
-	internal static class ReflectionReturnType
+	public static class ReflectionReturnType
 	{
 		public static bool IsDefaultType(Type type)
 		{