using (var wb = new XLWorkbook()) { var ws = wb.Worksheets.Add("Sheet1"); ws.Cell("A1").Value = "Hello, World!"; wb.SaveAs("example.xlsx"); }
var wb = new XLWorkbook("example.xlsx"); var ws = wb.Worksheet("Sheet1"); var cell = ws.Cell("A1"); Console.WriteLine(cell.Value.ToString());In this example, an existing workbook named "example.xlsx" is opened. The worksheet "Sheet1" is selected and the cell A1 is retrieved. The value in the cell is printed to the console. The package library for ClosedXML is "ClosedXML" which can be installed using NuGet package manager.