How to convert Excel to PDF using C# and VB.NET

using Syncfusion.Pdf;
using Syncfusion.XlsIO;
using Syncfusion.ExcelToPdfConverter;

Imports Syncfusion.Pdf
Imports Syncfusion.XlsIO
Imports Syncfusion.ExcelToPdfConverter

using (ExcelEngine excelEngine = new ExcelEngine())
{
    IApplication application = excelEngine.Excel;
    application.DefaultVersion = ExcelVersion.Excel2013;
    IWorkbook workbook = application.Workbooks.Open("Sample.xlsx", ExcelOpenType.Automatic);
    //Open the Excel document to convert
    ExcelToPdfConverter converter = new ExcelToPdfConverter(workbook);
    //Initialize PDF document
    PdfDocument pdfDocument = new PdfDocument();
    //Convert Excel document into PDF document
    pdfDocument = converter.Convert();
    //Save the PDF file
    pdfDocument.Save("ExcelToPDF.pdf");
    //This will open the PDF file so, the result will be seen in default PDF viewer
    System.Diagnostics.Process.Start("ExcelToPDF.pdf");
}

Using excelEngine As ExcelEngine = New ExcelEngine()
    Dim application As IApplication = excelEngine.Excel
    application.DefaultVersion = ExcelVersion.Excel2013
    Dim workbook As IWorkbook = application.Workbooks.Open("Sample.xlsx", ExcelOpenType.Automatic)
    'Open the Excel document to convert
    Dim converter As ExcelToPdfConverter = New ExcelToPdfConverter(workbook)
    'Initialize the PDF document
    Dim pdfDocument As PdfDocument = New PdfDocument()
    'Convert Excel document into PDF document
    pdfDocument = converter.Convert()
    'Save the PDF file
    pdfDocument.Save("ExcelToPDF.pdf")
End Using
'This will open the PDF file so, the result will be seen in default PDF viewer
System.Diagnostics.Process.Start("ExcelToPDF.pdf")