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                # Compiler Error CS0445 無法修改取消裝箱轉換的結果 取消裝箱轉換的結果是一個臨時變量。編譯器禁止您修改這樣的變量,因為當臨時變量消失時,任何修改也隨之消失。若要修復此錯誤,聲明新的值類型變量來存儲中間表達式,并將取消裝箱的轉換的結果賦給該新變量。 下面的代碼生成 CS0455。 ``` // CS0445.CS class UnboxingTest { public static void Main() { Point p; p.x = 1; p.y = 2; object obj = p; // The following line generates CS0445, because the result // of unboxing obj is a temporary variable. ((Point)obj).x = 2; // The following lines resolve the error. // Store the result of the unboxing conversion in p2. Point p2; p2 = (Point)obj; // Then you can modify the unboxed value. p2.x = 2; } } struct Point { public int x, y; } ```
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