' NOTE: If you change the interface name "IService1" here, you must also update the reference to "IService1" in App.config.
<ServiceContract()> _
Public Interface IInventoryService

  <OperationContract()> _
  Function GetInStock(ByVal productId As Integer) As Short

  <OperationContract()> _
  Function GetProduct(ByVal productId As Integer) As Product

  <OperationContract()> _
  Function UpdateProduct(ByVal _product As Product) As Boolean

End Interface

' Use a data contract as illustrated in the sample below to add composite types to service operations
<DataContract()> _
Public Class Product

  Private productIdValue As Integer
  <DataMember()> _
  Public Property ProductId() As Integer
    Get
      Return productIdValue
    End Get
    Set(ByVal value As Integer)
      productIdValue = value
    End Set
  End Property

  Private productNameValue As String
  <DataMember()> _
  Public Property ProductName() As String
    Get
      Return productNameValue
    End Get
    Set(ByVal value As String)
      productNameValue = value
    End Set
  End Property

  Private unitPriceValue As Decimal
  <DataMember()> _
  Public Property UnitPrice() As Decimal
    Get
      Return unitPriceValue
    End Get
    Set(ByVal value As Decimal)
      unitPriceValue = value
    End Set
  End Property

  Private unitsInStockValue As Short
  <DataMember()> _
  Public Property UnitsInStock() As Short
    Get
      Return unitsInStockValue
    End Get
    Set(ByVal value As Short)
      unitsInStockValue = value
    End Set
  End Property

  Private unitsOnOrderValue As Short
  <DataMember()> _
  Public Property UnitsOnOrder() As Short
    Get
      Return unitsOnOrderValue
    End Get
    Set(ByVal value As Short)
      unitsOnOrderValue = value
    End Set
  End Property

End Class