//using the SpreadsheetLight library using SpreadsheetLight; //create a new SLDocument object SLDocument doc = new SLDocument(); //select the range of cells to style SLStyle style = doc.CreateStyle(); style.Font.FontName = "Arial"; style.Font.FontSize = 12; doc.SetCellStyle("A1:B6", style); //save the document doc.SaveAs("example.xlsx");In this example, we're using the SpreadsheetLight library to create a new spreadsheet document. Then, we're selecting the range of cells to style (in this case, cells A1 through B6), and applying a specific style to them (in this case, setting the font to Arial and the font size to 12). Finally, we're saving the document to disk as a new file called "example.xlsx". Overall, the Range ApplyStyle method is a useful tool for developers working with spreadsheets in C#. By allowing them to apply custom styles to specific ranges of cells, it can make their data more readable and visually appealing.