(C#) How to close excel workbook

Question

I'm trying to get some datas from an excel worksheet. I'm using this code:

string excelFinalPath = @"C:\Users\fra31\source\repos\Key Visor\Key Visor\Foglio1.xls";
            Microsoft.Office.Interop.Excel.Application application = new Microsoft.Office.Interop.Excel.Application();
            Workbook workBook = application.Workbooks.Open(excelFinalPath);


        Worksheet worksheet = workBook.Worksheets[1];
        object tag = ((Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, 1]).Value;
        MessageBox.Show(tag.ToString());

workBook.Close(true, excelFinalPath, null);
            Marshal.ReleaseComObject(workBook);

but when I open the excel workbook it's not editable. I've read it happens because I'm using multiple dots, but i don't understand where. Can someone help me to understand what I should change?

Answer 1

application.Quit(); does the job.