Public Shared Sub MyMethod(myServiceCollection As _
   ServiceDescriptionBaseCollection)
   Dim myType As Type = myServiceCollection.GetType()
   If myType.Equals( _
      GetType(System.Web.Services.Description.ServiceCollection)) Then

      ' Remove the services at index 0 of the collection.
      CType(myServiceCollection, ServiceCollection).Remove( _
         myServiceDescription.Services(0))

      ' Build a new Service.
      Dim myService As New Service()
      myService.Name = "MathService"
      Dim myXmlQualifiedName As _
         New XmlQualifiedName("s0:MathServiceSoap")

      ' Build a new Port for SOAP.
      Dim mySoapPort As New Port()
      mySoapPort.Name = "MathServiceSoap"
      mySoapPort.Binding = myXmlQualifiedName
      Dim mySoapAddressBinding As New SoapAddressBinding()
      mySoapAddressBinding.Location = "http://localhost/" & _
         "ServiceDescriptionBaseCollection_VB/AddSubtractService.VB.asmx"
      mySoapPort.Extensions.Add(mySoapAddressBinding)

      ' Build a new Port for HTTP-GET.
      Dim myXmlQualifiedName2 As _
         New XmlQualifiedName("s0:MathServiceHttpGet")
      Dim myHttpGetPort As New Port()
      myHttpGetPort.Name = "MathServiceHttpGet"
      myHttpGetPort.Binding = myXmlQualifiedName2
      Dim myHttpAddressBinding As New HttpAddressBinding()
      myHttpAddressBinding.Location = "http://localhost/" & _
         "ServiceDescriptionBaseCollection_VB/AddSubtractService.VB.asmx"
      myHttpGetPort.Extensions.Add(myHttpAddressBinding)

      ' Add the ports to the Service.
      myService.Ports.Add(myHttpGetPort)
      myService.Ports.Add(mySoapPort)

      ' Add the Service to the ServiceCollection.
      myServiceDescription.Services.Add(myService)
   Else
      If myType.Equals( _
         GetType(System.Web.Services.Description.BindingCollection)) Then

         ' Remove the Binding in the BindingCollection at index 0.
         CType(myServiceCollection, BindingCollection).Remove( _
            myServiceDescription.Bindings(0))

         ' Build a new Binding.
         Dim myBinding As New Binding()
         myBinding.Name = "MathServiceSoap"
         Dim myXmlQualifiedName As _
            New XmlQualifiedName("s0:MathServiceSoap")
         myBinding.Type = myXmlQualifiedName
         Dim mySoapBinding As New SoapBinding()
         mySoapBinding.Transport = "http://schemas.xmlsoap.org/soap/http"
         mySoapBinding.Style = SoapBindingStyle.Document

         ' Create the operations for the binding.
         Dim addOperationBinding As OperationBinding = _
            CreateOperationBinding("Add", _
            myServiceDescription.TargetNamespace)
         Dim subtractOperationBinding As OperationBinding = _
            CreateOperationBinding("Subtract", _
            myServiceDescription.TargetNamespace)

         ' Add the operations to the Binding.
         myBinding.Operations.Add(subtractOperationBinding)
         myBinding.Operations.Add(addOperationBinding)
         myBinding.Extensions.Add(mySoapBinding)

         ' Add the Binding to the Bindings collection.
         myServiceDescription.Bindings.Add(myBinding)
      Else
         If myType.Equals( _ 
            GetType(System.Web.Services.Description.PortTypeCollection)) Then

            ' Remove the PortType at index 0.
            CType(myServiceCollection, PortTypeCollection).Remove( _ 
               myServiceDescription.PortTypes(0))

            ' Build a new PortType.
            Dim myPortType As New PortType()
            myPortType.Name = "MathServiceSoap"

            ' Build an AddOperation for the PortType.
            Dim myAddOperation As New Operation()
            myAddOperation.Name = "Add"

            ' Build the Input and Output messages for the Operations.
            Dim myOperationInputMessage1 As New OperationInput()
            Dim myXmlQualifiedName1 As New XmlQualifiedName("s0:AddSoapIn")
            myOperationInputMessage1.Message = myXmlQualifiedName1
            
            Dim myOperationOutputMessage1 As New OperationOutput()
            Dim myXmlQualifiedName2 As New XmlQualifiedName("s0:AddSoapOut")
            myOperationOutputMessage1.Message = myXmlQualifiedName2

            ' Add the messages to the operations.
            myAddOperation.Messages.Add(myOperationInputMessage1)
            myAddOperation.Messages.Add(myOperationOutputMessage1)

            ' Build an Add Operation for the PortType.
            Dim mySubtractOperation As New Operation()
            mySubtractOperation.Name = "Subtract"

            ' Build the Input and Output messages for the operations.
            Dim myOperationInputMessage2 As New OperationInput()
            Dim myXmlQualifiedName3 As _
               New XmlQualifiedName("s0:SubtractSoapIn")
            myOperationInputMessage2.Message = myXmlQualifiedName3
            Dim myOperationOutputMessage2 As New OperationOutput()
            Dim myXmlQualifiedName4 As _
               New XmlQualifiedName("s0:SubtractSoapOut")
            myOperationOutputMessage2.Message = myXmlQualifiedName4

            ' Add the messages to the operations.
            mySubtractOperation.Messages.Add(myOperationInputMessage2)
            mySubtractOperation.Messages.Add(myOperationOutputMessage2)

            ' Add the operations to the PortType.
            myPortType.Operations.Add(myAddOperation)
            myPortType.Operations.Add(mySubtractOperation)

            ' Add the PortType to the collection.
            myServiceDescription.PortTypes.Add(myPortType)
         End If
      End If
   End If
End Sub