if (MessageBox.Show("确定要退出吗？", "", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.Cancel)

{}

MessageBoxButtons messButton = MessageBoxButtons.OKCancel;

DialogResult dialogResult = MessageBox.Show("是否确定选择Specification Configure文件?", "Configure文件", messButton);

 if (dialogResult == DialogResult.OK)

{}