Message in Chinese (Traditional) (中文（繁體）)
'<var>X</var>' 不包含 '<var>Y</var>' 的定義，也找不到擴充方法 '<var>Y</var>' 來接受型別 '<var>X</var>' 的第一個引數 (您是否遺漏 using 指示詞或組件參考?)
Unlocalized message
'<var>X</var>' does not contain a definition for '<var>Y</var>' and no extension method '<var>Y</var>' accepting a first argument of type '<var>X</var>' could be found (are you missing a using directive or an assembly reference?)
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