「説明」という言葉で、「タイプが必要です」というエラーが表示されます
Imports System.ServiceModel
Imports System.Web
Imports System.IO
Imports System.Runtime.Remoting.Activation
Imports System.Collections.Generic
Imports System.ServiceModel.Web
Namespace SimpleRESTService
<ServiceContract()> _
Public Interface IService
<Description("Simple echo operation over HTTP GET"), _
WebGet()> _
Function EchoWithGet(ByVal s As String) As String
<Description("Simple echo operation over HTTP POST"), _
WebInvoke()> _
Function EchoWithPost(ByVal s As String) As String
End Interface
End Namespace