End Google Ads 201810 - BS.net 01 --> I am navigating Excel sheet in WebBrowser control.

eBrowser.Navigate("D:\test.xlsx", false);

if I am updating something in excel sheet which is displayed in WB control then I want to save that changes back to ******** or wants to import sheet with changes in data table.
I tried to get WB control document on Navigated and DocumentComplete event but always getting wb.Document as null.

So please help me to save the Excel from WB on button click.
I don't want to use ctrl+s option which we can use to save excel directly.
Regards,

Raj