private void button5_Click(object sender, EventArgs e) { if(MessageBox.Show("Do you really want to remove all task history ?", "SecureDelete", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes) { HistoryManager man = new HistoryManager(); man.LoadHistory(SecureDeleteLocations.GetScheduleHistoryFile()); man.Clear(); man.SaveHistory(SecureDeleteLocations.GetScheduleHistoryFile()); } }