* Duplicate file streams before sending
* Other code needs to dispose their objects
* Another resource to dispose
* Stop disposing and copying streams in SendAsync
* Fix inverted boolean check
Co-authored-by: Dmitry <dimson-n@users.noreply.github.com>
* Await results for using statement to work
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Co-authored-by: Dmitry <dimson-n@users.noreply.github.com>