private void btnNext_Click(object sender, EventArgs e) { if (fSecond == null) { fSecond = new frmSecondLecture(); fSecond.Show(dp, DigitalRune.Windows.Docking.DockState.Document); } else { fSecond.Activate(); }
fSecond.Show(dp, DigitalRune.Windows.Docking.DockState.Document);
var
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