Thursday, 23 July 2009

Updating assembly versions in Visual Studio project files

Sometimes you need to update all the references to a particular assembly so that they use a newer version than the original one that was added to the project.

One option is to manually edit the references for each project, removing and re-adding the assembly.

Option two, which is a bit nicer, is to use something like this PowerShell script:

Get-ChildItem -recurse -filter "*.*proj" | Foreach-Object { (Get-Content $_.FullName) | Foreach-Object { $_ -replace "1.0.3.0", "1.1.0.0" } | Set-Content $_.FullName }

In this example, we are replacing instances of "1.0.3.0" with "1.1.0.0" – handy if you just happened to be upgrading to the latest version of Castle.

Note the use of the parentheses () around the Get-Content - without those you'll end up with an Access Denied error as it will be trying to write to the same file it is reading from.

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