I'm trying to write some data from my windowsform into a `Excel` file, this works.

```
        ' Excel load data
    Dim oExcelApp As New Microsoft.Office.Interop.Excel.Application
    Dim oWorkBook As Microsoft.Office.Interop.Excel.Workbook
    Dim oWorkSheet As Microsoft.Office.Interop.Excel.Worksheet

    oWorkBook = oExcelApp.Workbooks.Open("C:\Temp\Test.xlsx")
    oWorkSheet = oWorkBook.Worksheets(1)

    oWorkSheet.Range("A1").Value = "Test"

    oWorkBook.Save()
    oWorkBook.Close()

```

Problem is: When I am done `Excel` is still running in my task manager. When I press the button like 10 times there are 10 `Excel` references in my task manager.

Question: How can I fully unload `Excel` after writing the value into the `Excel`?