We have ascx user controls written in VB.NET for an ASP.NET 4.0 project. The built-in VS page validator always displays the message from the question for all custom properties of our user control.We have ascx user controls written in VB.NET fo
阅读背景：
用于用户控件的ASP.NET验证消息“属性...不是元素的有效属性...”
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