How to show multi-lines in WinForms GridListControl?
By default, WinForms GridListControl can support multiline textbox and the content will be displayed based on the row height. The content can be automatically resized by using ResizeToFit property to show multi-line in a textbox.
C#
this.gridListControl1.Grid.RowHeights.ResizeToFit(GridRangeInfo.Table());VB
Me.gridListControl1.Grid.RowHeights.ResizeToFit(GridRangeInfo.Table()) Before Resizing

After Resizing

Samples: