Start Visual Studio solution with a project unloaded

Question

Is it possible to start Visual Studio with a project unloaded (unavailable at start)?

The reason for this is that, when starting, I often find that Deployment Projects often hangs for about a minute when starting, and they aren't used that often either.

Setting these projects to unavailable and saving the solution doesn't make any change to project file, so if anyone has any suggestions on how to do this (either in Visual Studio proper, or through modifying the XML in the .sln file) I'd appreciate it.

Thanks in advance.

Edit: 2020-09-14: In the interests of keeping this question up to date, I have changed the accepted answer to the one by Johny Skovdal. The gist of this is that Visual Studio now offers this ability built in (link) via .slnf files.

Answer 1

As of Visual Studio 2019, this is now a native feauture called "Solution Filtering", which allows you to have different .slnf files you can open instead of your sln file. This keeps the projects you choose unloaded from the get go. This has dramatically increased our solution performance! :)

As for keeping everything unloaded to begin with, there is also a new flag in Visual Studio 2019:

devenv /donotloadprojects MySln.sln

From there you can then load the projects you want to include, and then create solution filters, so you can open that the next time around with only those projects preloaded. :)