EPPlus is a great package used in C# to export and import excel files. Here I am sharing how we can format data while exporting data to excel.
1) Formatting text, possible values:"Italic", "Bold"
sheetcreate.Cells[1, 1].Style.Font.Bold = true;
2) For merging cells
sheetcreate.Cells[1, 1, 1, 5].Merge = true; //Address "A1:A5"
3) Setting up border for cells
sheetcreate.Cells[1, 1].Style.Border.BorderAround(OfficeOpenXml.Style.ExcelBorderStyle.Thin);
4) Setting up cell alignment. It can be "Center", "Right" and "Left".
sheetcreate.Cells[1, 1].Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
5) Setting up background color
sheetcreate.Cells[1, 1].Style.Fill.BackgroundColor.SetColor(System.Drawing.ColorTranslator.FromHtml("#e0e0e0"));
6) To avoid word wrap in excel use blow function. It should be written after creation of excel sheet.
sheetcreate.Cells.AutoFitColumns();