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My dll cannot be deleted, so deployment fails suddenly
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(105.60000000000001, 88%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ECQ%3C/text%3E%3C/svg%3E)
Christina Quast
0
Reputation points
portalWeb deployment task failed. (Web Deploy cannot modify the file 'MyProgram.dll' on the destination because it is locked by an external process. In order to allow the publish operation to succeed, you may need to either restart your application to release the lock, or use the AppOffline rule handler for .Net applications on your next publish attempt. Learn more at: http://go.microsoft.com/fwlink/?LinkId=221672#ERROR_FILE_IN_USE. Learn more at: https://go.microsoft.com/fwlink/?LinkId=221672#ERROR_FILE_IN_USE.)
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Jiale Xue - MSFT 49,361 Reputation points Microsoft External Staff2025-03-12T09:39:40.3733333+00:00 Hi @Christina Quast , Welcome to Microsoft Q&A,
You seem to be deploying a web project. What project are you using? The web has its own tag on the forum, and c# is not specific to it. The link you referenced provides some solutions. Have you tried them?
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