GrapeCity.Windows.SpreadSheet.Data.StyleInfo style = new GrapeCity.Windows.SpreadSheet.Data.StyleInfo("TextStyle");
style.Underline = true;
style.Strikethrough = false;
gcSpreadSheet1.Sheets[0].NamedStyles.Add(style);
gcSpreadSheet1.Sheets[0].Cells[0, 0].StyleName = "TextStyle";
gcSpreadSheet1.Sheets[0].Cells[0, 0].Text = "Style";
listBox1.Items.Add(style.IsStrikethroughSet().ToString());
listBox1.Items.Add(style.IsUnderlineSet().ToString());
//style.ResetStrikethrough();
//style.ResetUnderline();