C# EXCEL LIBRARYHigh-performance UWP Excel Framework

//Create an instance of ExcelEngine
ExcelEngine excelEngine = new ExcelEngine();

IApplication application = excelEngine.Excel;

//Instantiates the File Picker. 
FileOpenPicker openPicker = new FileOpenPicker();
openPicker.SuggestedStartLocation = PickerLocationId.Desktop;
openPicker.FileTypeFilter.Add(".xlsx");
openPicker.FileTypeFilter.Add(".xls");
StorageFile openFile = await openPicker.PickSingleFileAsync();

//Opens the workbook. 
IWorkbook workbook = await application.Workbooks.OpenAsync(openFile);

//Access first worksheet from the workbook.
IWorksheet worksheet = workbook.Worksheets[0];

//Set Text in cell A3.
worksheet.Range["A3"].Text ="Hello World";

//Sets workbook version.
workbook.Version = ExcelVersion.Excel2013;

//Initializes FileSavePicker.
FileSavePicker savePicker = new FileSavePicker();
savePicker.SuggestedStartLocation = PickerLocationId.Desktop;
savePicker.SuggestedFileName = "CreateSpreadsheet";
savePicker.FileTypeChoices.Add("Excel Files", new List<string>() { ".xlsx" });

//Creates a storage file from FileSavePicker.
StorageFile storageFile = await savePicker.PickSaveFileAsync();

//Saves changes to the specified storage file.
await workbook.SaveAsAsync(storageFile);

workbook.Close();
excelEngine.Dispose();