Missing .sln file in C# / vb.net apps?

I am working with source code (C# and vb.net apps). Many of the projects do not have a solution file (.sln file). I would like to know (which version of Visual Studio) these projects were coded/developed in? Is there a way to determine what Version of Visual Studio (2019, 2022 etc.) these projects were coded in without a .sln file?