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Clears the selected sparkline groups.
Removes the sparkline groups associated with the selected cells. Unlike Clear(), this method removes entire sparkline groups rather than only clearing individual sparkline objects from the selected cells.
void ClearGroups()
Sub ClearGroups()
worksheet.Range["A1:B2"].Value = new object[,] {
{1, 2},
{3, 4}
};
worksheet.Range["D1:D2"].SparklineGroups.Add(SparkType.Line, "A1:B2");
worksheet.Range["D1"].SparklineGroups.ClearGroups();