C# Flow Layout Panel Line break or New line

After adding the last control before the break, call flow.SetFlowBreak(lastControl, true).

Note: lastControl is the control that you want set new line after that.

The best answer is by far the comment made by Brian Gillespie:

Set FlowBreak from the VS2010 GUI: Scroll to the bottom of the PropertyPanel for the control before the line break, and set FlowBreak to True.