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I.m尝试使用来自Facebook的示例示例在VB中实现ASP.NET应用程序C#SDK V 5.0.3下载但我在auth.Autherize()获得了以下错误。它出什么问题了?Facebook C#SDK V 5.0.3错误
前提条件失败:String.IsNullOrEmpty(pathAndQuery)
Dim auth = New CanvasAuthorizer With {.Perms = "user_about_me"}
If (auth.Authorize()) Then
ShowFacebookContent()
End If