Fixed parameter name guessing.

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

@@ -234,7 +234,6 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 			if (node is DirectionExpression) {
 				node = ((DirectionExpression)node).Expression;
 			}
-
 			if (node is IdentifierExpression) {
 				name = ((IdentifierExpression)node).Identifier;
 			} else if (node is MemberReferenceExpression) {
@@ -243,8 +242,9 @@ namespace ICSharpCode.NRefactory.CSharp.Refactoring
 				var pe = (PrimitiveExpression)node;
 				if (pe.Value is string) {
 					name = CreateBaseNameFromString(pe.Value.ToString());
+				} else {
+					name = char.ToLower(type.Name [0]).ToString();
 				}
-				name = char.ToLower(type.Name [0]).ToString();
 			} else {
 				name = type.Kind == TypeKind.Unknown ? "par" : type.Name;
 			}

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

@@ -546,6 +546,29 @@ namespace Test {
 }
 ");
 		}
+
+		[Test()]
+		public void TestStringParameterNameGuessing ()
+		{
+			TestCreateMethod (@"class TestClass
+{
+	static void TestMethod ()
+	{
+		$NonExistantMethod (""Hello World!"");
+	}
+}", @"class TestClass
+{
+	static void NonExistantMethod (string helloWorld)
+	{
+		throw new System.NotImplementedException ();
+	}
+	static void TestMethod ()
+	{
+		NonExistantMethod (""Hello World!"");
+	}
+}");
+		}
+
 	}
 }