How to Copy a File While It Is Being Used by Another Process

Copying a file when it is in use by another process

You should activate shadow copying of your DLLs. Read more here: https://learn.microsoft.com/en-us/dotnet/framework/app-domains/shadow-copy-assemblies

Essentially, when you enable shadow copying (by setting the ShadowCopyFiles property to the string value "true"), all assemblies in the application path to be copied to a download cache before they are loaded. You can then copy the assemblies from the cache folder--those won't be locked.

Does that help?

Windows command to copy file forcefully when that file is used by another process

As said in another thread by Alex K. your solution is with very high probability hobocopy

How to Copy a file which is already being used

If available on the system, you could use a snapshot using the Volume Shadow Copy Service

From C#, there's the handy AlphaVSS library that wraps the COM interface, but you could implement it directly.

If VSS is not available, then tough luck, no way around a file lock

PS: of course, this ain't as easy as File.Copy

File is being used by another process after File.Copy

File was being blocked by another process without me being aware of it. Process Explorer was really helpful.

Typical easy issue hard to spot.

How to copy a file to another folder while a process is using it

As mentioned in the post below:

The important part is the FileShare.ReadWrite when opening the
FileStream

How to copy a file while it is being used by another process

In short, make sure that you specify the correct access parameters while opening the file.

How to Avoid Used by another process When using File.Copy in C#

Often the reason because one of the programs from Windows is using the file you are trying to copy -- in my case the file was used by Visual Studio cs was in debug file ...