Backup your project (cs, vb, whatever language). Start the command line as administrator. Run the following: dotnet tool install -g upgrade-assistant Move to the folder of your vs.net project: cd path\to\yourproject Run the following command to upgrade the project: upgrade-assistant upgrade path\to\yourproject\yourproject.sln
Make sure that you've installed the sdk (It can be done also through the "Visual studio installer" -> "modify" -> Single Components -> .net ) https://dotnet.microsoft.com/en-us/download/visual-studio-sdks .net 10 sdk -> https://dotnet.microsoft.com/en-us/download/dotnet/10.0 Restart vs.net. -- Any older project must be upgraded if the used .net framework was below 5.