private bool addSelectedSection() { CutSection s = new CutSection(); s.startFrame = (int)startFrame.Value; s.endFrame = (int)endFrame.Value; if (s.endFrame <= s.startFrame) { MessageBox.Show("The end frame must be larger than the start frame", "Invalid section configuration", MessageBoxButtons.OK, MessageBoxIcon.Stop); return(false); } if (!cuts.addSection(s)) { MessageBox.Show("Section overlaps with another", "Invalid configuration", MessageBoxButtons.OK, MessageBoxIcon.Stop); return(false); } return(true); }