message type not supported by sender

短信发不出去

nullreferenceexception message="未将对象引用设置到对象的实例.

首先来看一下是怎么调用的,代码如下:publicbooleansendmessagemail

空指针异常为什么呢

$button_click_2(object sender, routedeventargs e) { message$

button_click_2(object sender, routedeventargs e) { message

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