BUG: Cannot step into Web method when you debug the ASP.NET Web service (316175)

MORE INFORMATION

This problem occurs when the Web method contains a String argument that is passed by reference. If you pass other data types, or if you pass the String argument by value, this problem does not occur. Additionally, this problem does not occur if you develop the ASP.NET Web Service in Microsoft Visual C# .NET or in Microsoft Visual C# 2005.

Steps to Reproduce Behavior

1. Start Visual Studio .NET or Visual Studio 2005.
2. Create a new ASP.NET Web Service in Visual Basic .NET or in Visual Basic 2005.
3. Open the Code window, and then add the following Web methods to the module:

   <WebMethod()> Public Function PassByRef(ByRef s As String) As String
       s = "Goodbye"
       Return s
   End Function
   
   <WebMethod()> Public Function PassByVal(ByVal s As String) As String
       s = "Goodbye"
       Return s
   End Function
   					

4. On the Build menu, click Build Solution to build the Web Service.
5. On the File menu, point to Add Project, and then click New Project.
6. Create a new Windows Application project in Visual Basic .NET or in Visual Basic 2005.
7. On the Project menu, click Add Web Reference.
8. Set a Web reference to the Web Service that you created in step 2, and then click Add Reference.
9. Add a Button control to the form, double-click the button to create an event handler for its Click event, and then add the following code in the Button1_Click event handler:

       Private Sub Button1_Click(ByVal sender As System.Object, _
       ByVal e As System.EventArgs) Handles Button1.Click
   
           'This code assumes that you referenced the localhost server
           'for your Web Service. Replace the line to follow with
           'the correct namespace and service name.
           Dim ws As New localhost.Service1()
           Dim s As String = "Hello"
           ws.PassByVal(s)
           ws.PassByRef(s)
       End Sub
   					

10. Insert a breakpoint on the following line of code:

            ws.PassByVal(s)
    					

11. In the Solution Explorer window, right-click the Windows Application project name, and then click Set as Startup Project.
12. Press F5 to run the application.
13. After the form loads, click the button. Notice that the debugger stops on the breakpoint that you set.
14. On the Debug menu, click Step Into. Notice that the debugger steps into the Web method in the ASP.NET Web Service project.
15. Step through the code in the Web method so that control returns to the Windows Application project. Notice that the debugger stops on the following line of code in the Form class:

            ws.PassByRef(s)
    					

16. On the Debug menu, click Step Into. Notice that the debugger steps over the call to the Web method instead of stepping into the Web method.