Fixed create method action bug.

ICSharpCode.NRefactory.CSharp/Formatter/AstFormattingVisitor.cs

@@ -928,7 +928,7 @@ namespace ICSharpCode.NRefactory.CSharp
 					}
 				}
 			} else {
-				foreach (var arg in parameters) {
+				foreach (var arg in parameters.Skip (1)) {
 					if (arg.PrevSibling != null) {
 						if (methodCallArgumentWrapping == Wrapping.DoNotWrap) {
 							ForceSpacesBeforeRemoveNewLines(arg, spaceAfterMethodCallParameterComma && arg.PrevSibling.Role == Roles.Comma);

ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/CreateMethodDeclarationAction.cs

@@ -240,7 +240,7 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 					nameCounter [name]++;
 					name += nameCounter [name].ToString();
 				}
-				var type = resolveResult.Type.Kind == TypeKind.Unknown ? new PrimitiveType("object") : context.CreateShortType(resolveResult.Type);
+				var type = resolveResult.Type.Kind == TypeKind.Unknown || resolveResult.Type.Kind == TypeKind.Null ? new PrimitiveType("object") : context.CreateShortType(resolveResult.Type);
 
 				yield return new ParameterDeclaration(type, name) { ParameterModifier = direction};
 			}
@@ -278,6 +278,8 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 		public static string CreateBaseName(AstNode node, IType type)
 		{
 			string name = null;
+			if (node is NullReferenceExpression)
+				return "o";
 			if (node is DirectionExpression)
 				node = ((DirectionExpression)node).Expression;
 			if (node is IdentifierExpression) {

ICSharpCode.NRefactory.Tests/CSharp/CodeActions/CreateMethodDeclarationTests.cs

@@ -714,6 +714,29 @@ class Foo
 ");
 		}
 
+		[Test]
+		public void TestPassNullArgument ()
+		{
+			Test<CreateMethodDeclarationAction> (@"class TestClass
+{
+	void TestMethod ()
+	{
+		$NonExistantMethod (null);
+	}
+}", @"class TestClass
+{
+	void NonExistantMethod (object o)
+	{
+		throw new System.NotImplementedException ();
+	}
+	void TestMethod ()
+	{
+		NonExistantMethod (null);
+	}
+}");
+		}
+
+
 
 	}
 }