Pragmatically upgrading .net framework version for all projects with PowerShell

Do feel free to provide any comments/feedback to @TheRichCarey on Twitter

We had a situation where we needed to upgrade all the CSPROJ files in a solution to 4.8. The issue is that some of our solutions contain almost a hundred projects so a manual intervention would be prone to error. (plus we have multiple solutions to apply this against!)

Whilst there are a number of extensions that do this on the VS Marketplace, they seemed a little overkill for something that can surely be achieved in PowerShell? At the end of the day its a simple find-and-replace, right?

This will load the solution file, iterate over each CSPROJ referenced and then replace the current framework version with the one specified in $versionToUse. It will then overwrite the file.

Potential improvements

This met my needs fine, but could be improved for sure! Things that it could do better are:

  • Auto scan for .sln files.
  • Provide some form of report at the end
  • Auto-checkout for TFS or Git (Using git CLI or TFS CLI)

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