private void Form1_Load(object sender, EventArgs e)
{ _deadlineDateTimePicker = new DateTimePicker();
ToolStripControlHost _deadlineToolStripControlHost = new ToolStripControlHost(_deadlineDateTimePicker);
_deadlineDateTimePicker.Width = 140;
_mainToolStrip.SuspendLayout();
_mainToolStrip.Items.Add(_deadlineToolStripControlHost);
//add other controls here
_mainToolStrip.ResumeLayout();
}