gcSpreadSheet1.Sheets[0].Rows[1].BackgroundThemeColor = "Accent 1 40";
gcSpreadSheet1.Sheets[0].Columns[2].BackgroundThemeColor = "Accent 3 40";
gcSpreadSheet1.Sheets[0].Rows[1].ForegroundThemeColor = "Accent 6 40";
gcSpreadSheet1.Sheets[0].Rows[1].FontTheme = "Heading";
gcSpreadSheet1.Sheets[0].Columns[2].ForegroundThemeColor = "Accent 6 40";
gcSpreadSheet1.Sheets[0].Columns[2].FontTheme = "Headings";
gcSpreadSheet1.Invalidate();
private void button1_Click(object sender, RoutedEventArgs e)
{
gcSpreadSheet1.Sheets[0].Cells[0, 0, 2, 2].Text = "Test";
gcSpreadSheet1.Invalidate();
}