A solution is a grouping of one or more projects that work together to create an application. The project and status information that pertain to the solution are stored in two solution files, a text-based solution (.sln) file and a binary solution user option (.suo) file. These files are similar to the group (.vbg) files that were used in earlier versions of Visual Basic, and the workspace (.dsw) files and user options (.opt) files that were used in earlier versions of Visual C++.
Describes the .sln file, which contains text-based information that the integrated development environment (IDE) uses to find and load the name-value parameters for the persisted data and project VSPackages it references.