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再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网移动版 - 专注IT技能提升
...快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during the execution of the current web request. Please review the st...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网移动版 - 专注IT技能提升
...快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during the execution of the current web request. Please review the st...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网移动版 - 专注IT技能提升
...快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during the execution of the current web request. Please review the st...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网移动版 - 专注IT技能提升
...快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during the execution of the current web request. Please review the st...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网移动版 - 专注C++内核技术
...快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during the execution of the current web request. Please review the st...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网移动版 - 专注C++内核技术
...快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during the execution of the current web request. Please review the st...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网移动版 - 专注C++内核技术
...快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during the execution of the current web request. Please review the st...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注C/C++及内核技术
...快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during the execution of the current web request. Please review the st...
再说WCF Data Contract KnownTypeAttribute - 更多技术 - 清泛网 - 专注C/C++及内核技术
...快你会发现浏览器（客户端）返回给你了错误：
Server Error in '/' Application.
The underlying connection was closed: The connection was closed unexpectedly.
Description: An unhandled exception occurred during the execution of the current web request. Please review the st...
Unable to cast object of type 'System.DBNull' to type 'System.String`
I got the above error in my app. Here is the original code
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