How to create an Excel file in UWP?

<Page
   x:Class="CreateXlsIOSample_UWP.MainPage"
   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   xmlns:local="using:CreateXlsIOSample_UWP"
   xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
   xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
   mc:Ignorable="d">
 
   <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
         <Button x:Name="button" Content="Create Document" Click="OnButtonClicked" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Grid>
 
</Page>

using Syncfusion.XlsIO;
using Windows.Storage.Pickers;
using Windows.Storage;

Imports Syncfusion.XlsIO
Imports Windows.Storage.Pickers
Imports Windows.Storage

// Create an instance of ExcelEngine.
using (ExcelEngine excelEngine = new ExcelEngine())
{
    // Set the default application version as Excel 2016.
    excelEngine.Excel.DefaultVersion = ExcelVersion.Excel2016;

    // Create a workbook with a worksheet.
    IWorkbook workbook = excelEngine.Excel.Workbooks.Create(1);

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

    // Insert sample text into cell "A1".
    worksheet.Range["A1"].Text = "Hello World";

    // Save the Workbook.
    StorageFile storageFile;
    if (!(Windows.Foundation.Metadata.ApiInformation.IsTypePresent("Windows.Phone.UI.Input.HardwareButtons")))
    {
        FileSavePicker savePicker = new FileSavePicker();
        savePicker.SuggestedStartLocation = PickerLocationId.Desktop;
        savePicker.SuggestedFileName = "Sample";
        savePicker.FileTypeChoices.Add("Excel Files", new List<string>() { ".xlsx" });
        storageFile = await savePicker.PickSaveFileAsync();
    }
    else
    {
        StorageFolder local = Windows.Storage.ApplicationData.Current.LocalFolder;
        storageFile = await local.CreateFileAsync("Sample.xlsx", CreationCollisionOption.ReplaceExisting);
    }
    // Saving the workbook.
    await workbook.SaveAsAsync(storageFile);

    // Launch the saved file.
    await Windows.System.Launcher.LaunchFileAsync(storageFile);
}

'Create an instance of ExcelEngine.
Using excelEngine As ExcelEngine = New ExcelEngine
 
    'Set the default application version as Excel 2016.
    excelEngine.Excel.DefaultVersion = ExcelVersion.Excel2016
  
    'Create a workbook with a worksheet.
    Dim workbook As IWorkbook = excelEngine.Excel.Workbooks.Create(1)
  
    'Access first worksheet from the workbook instance
    Dim worksheet As IWorksheet = workbook.Worksheets(0)
  
    'Insert sample text into cell A1.
    worksheet.Range("A1").Text = "Hello World"
  
    'Save the Workbook
    Dim storageFile As StorageFile
  
    If Not Windows.Foundation.Metadata.ApiInformation.IsTypePresent("Windows.Phone.UI.Input.HardwareButtons") Then
       Dim savePicker As FileSavePicker = New FileSavePicker
       savePicker.SuggestedStartLocation = PickerLocationId.Desktop
       savePicker.SuggestedFileName = "Sample"
       savePicker.FileTypeChoices.Add("Excel Files", New List(Of String))
       storageFile = savePicker.PickSaveFileAsync
    Else
       Dim local As StorageFolder = Windows.Storage.ApplicationData.Current.LocalFolder
       storageFile = local.CreateFileAsync("Sample.xlsx", CreationCollisionOption.ReplaceExisting)
    End If
  
    'Saving the workbook
    Function workbook_SaveAsAsync_((ByVal Unknown As storageFile) As await Implements workbook.SaveAsAsync.(Of
    End Function
  
    'Launch the saved file
    Function Windows_System_Launcher_LaunchFileAsync_((ByVal Unknown As storageFile) As await Implements Windows.System.Launcher.LaunchFileAsync.(Of
    End Function
End Using