Reset workbook (All worksheets)
To reset entire workbook, remove all worksheets and create an empty worksheet, use the reset method of control.
reoGridControl.Reset();
Reset worksheet
To reset specified worksheet, use the reset method of that worksheet.
reoGridControl.CurrentWorksheet.Reset();
Reset worksheet to specified rows and columns
To reset worksheet to specified number of rows and columns, us reset method and pass the number of rows and columns arguments.
// number of rows is 1000, and number of columns is 200
sheet.Reset(1000, 200);