In VS2022, the interfaces `IVsSolutionLoadManager` and `IVsSolutionLoadManagerSupport` have been removed. What is the recommended way now to handle solution load?

I have a custom project solution which does some cleanup tasks before the solutions are opened. With Visual Studio 2022, in the list of removed APIs, https://docs.microsoft.com/en-us/visualstudio/extensibility/migration/removed-api-list?view=vs-2022#asynchronous-solution-load-and-lightweight-solution-load one of the items are the interfaces IVsSolutionLoadManager and IVsSolutionLoadManagerSupport. After this removal, what is the recommended way to handle solution load.

[zivkan]

There are APIs like IVsSolutionEvents.OnAfterOpenSolution, IVsSolutionEvents.OnBeforeCloseSolution, IVsSolutionEvents.OnAfterCloseSolution, and KnownUIContexts.SolutionOpeningContext. Note that IVsSolution.GetSolutionInfo will return nulls (no solution loaded) when SolutionOpeningContext’s callback triggers. This one caught me out and I didn’t find a good solution except to re-check IVsSolution.GetSolutionInfo in every place that needs to know the solution path until the first time it’s not null. In practice, it was always not null the very next callback I received, but that might be IVsSolutionEvents.OnAfterLoadProject or IVsSolutionEvents.OnAfterLoadSolution, depending on whether or not the solution has any projects. When a solution does contain one or more projects, there wasn’t any event I could find that would allow me to get the solution directory before per-project events started coming in.

It’s not always easy, and sometimes can take significant time, but if you go the dotnet api browser, and select VS SDK 2022, or search scoped to the VS SDK, then you can start searching for keywords like solution and slowly hunt through the results until you find something worth testing. In fact, doing this in order to get the links for this comment, I discovered that there exists a SolutionEvents class, which claims to be a “Managed-friendly wrapper for IVsSolutionEvents”.

[kaveeshd]

@zivkan Thank you, your comments helped. It took me sometime to figure this out, and put everything in order.

I will close this issue.