- In the wwwroot directory, create a directory called MyWebService.
- Open Notepad and enter the following code:

<%@ WebService Language="C#" Class="MyWebService" %>

using System.Web.Services;

public class MyWebService : WebService
{
	[WebMethod]
	public string HelloWorld()
	{
		return "Hello World! Welcome to my web service.";
	}
}

- Save this as MyWebService.asmx in the wwwroot\MyWebService directory.
- Open the command prompt under Visual Studio .NET Tools in the Start menu.
- If you don't have Visual Studio, then you'll need the .NET SDK.
- In the command prompt, navigate to the C drive. - Type the following:

disco http://localhost/MyWebService/MyWebService.asmx

- This creates MyWebService.wsdl in the C drive.
- In the command prompt, type the following:

wsdl MyWebService.wsdl

- This creates MyWebService.cs in the C drive.
- In the command prompt, type the following:

csc /t:library /out:MyWebService.dll /r:System.Web.Services.dll MyWebService.cs

- This creates MyWebService.dll in the C drive.
- Open Notepad and enter the following code:

using System;

namespace ConsoleApplication
{
	class InvokeWebService
	{
		[STAThread]
		static void Main(string[] Args)
		{
			MyWebService objMyWebService = new MyWebService();
			Console.WriteLine(MyWebService.HelloWorld());
		}
	}
}

- Save this as InvokeWebService.cs in the C drive.
- In the Visual Studio .NET command prompt, type the following:

csc /r:MyWebService.dll InvokeWebService.cs

- This creates MyWebService.exe in the C drive.
- Now all that's left to do is to run the program. Type the following:

MyWebService.exe

- You should see

Hello World! Welcome to my web service.

- Now sign my guestbook!