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May 5th, 2016
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C# 0.21 KB | None | 0 0
  1. var messageBoxResult = MessageBox.Show(
  2.             "Вы точно хотите закрыть файл?", "Закрытие",
  3.             MessageBoxButtons.YesNo);
  4.  
  5. e.Cancel = messageBoxResult == DialogResult.No;
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