| UseOfficeCloseExcel Method | 
            Releases MS Excel® library from memory
            
Namespace: SautinSoftAssembly: UseOffice (in UseOffice.dll) Version: 2025.10.22
 Syntax
Syntax Example
ExampleHow to convert a XLSX file to a PDF file in C#
using System;
using System.IO;
using System.Collections;
namespace Sample
{
    class Test
    {
        static void Main(string[] args)
        {
            
            
            
            
            
            
            
            SautinSoft.UseOffice u = new SautinSoft.UseOffice();
            string inpFile = Path.GetFullPath(@"..\..\..\..\..\..\TestFiles\example.xlsx");
            string outFile = Path.GetFullPath("Result.pdf");
            
            int ret = u.InitExcel();
            
            
            
            if (ret == 1)
            {
                Console.WriteLine("Error! Can't load MS Excel library in memory");
                return;
            }
            
            ret = u.ConvertFile(inpFile, outFile, SautinSoft.UseOffice.eDirection.XLSX_to_PDF);
            
            u.CloseExcel();
            
            
            
            
            
            if (ret == 0)
            {
                
                System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
            }
            else
                Console.WriteLine("Error! Please contact with SautinSoft support: support@sautinsoft.com.");
        }
    }
}How to convert a XLSX file to a PDF file in VB.Net
Imports System
Imports System.IO
Imports System.Collections
Namespace Sample
    Friend Class Test
        Shared Sub Main(ByVal args() As String)
            
            
            
            
            
            
            
            Dim u As New SautinSoft.UseOffice()
            Dim inpFile As String = Path.GetFullPath("..\..\..\..\..\..\TestFiles\example.xlsx")
            Dim outFile As String = Path.GetFullPath("Result.pdf")
            
            Dim ret As Integer = u.InitExcel()
            
            
            
            If ret = 1 Then
                Console.WriteLine("Error! Can't load MS Excel library in memory")
                Return
            End If
            
            ret = u.ConvertFile(inpFile, outFile, SautinSoft.UseOffice.eDirection.XLSX_to_PDF)
            
            u.CloseExcel()
            
            
            
            
            
            If ret = 0 Then
                
                System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
            Else
                Console.WriteLine("Error! Please contact with SautinSoft support: support@sautinsoft.com.")
            End If
        End Sub
    End Class
End Namespace See Also
See Also