Read-only Loading Of An XML

I use Microsoft.XMLDOM load() method to load an XML file into memory
and display
some elements in the browser.

However it apparently locks the file, since I get this error message
whenever a Visual Basic application concurrently tries to add an
element to the same XML file:

The process cannot access the file because it is being used by another
process.

I would like not to lock this file, but open it in read-only mode
instead. In fact the browser simply needs to read its content, it
doesn't need to modify it at all. As a consequence there is no reason
to lock it.

At the same time, I need to access it from the VB process.