An SHPROJ file is a code sharing app project created by Microsoft Visual Studio, a software development tool used to develop Windows programs and web applications. It allows developers in Visual Studio to create multiple applications that use the same source code. SHPROJ files store the paths to source files, such as .XAML, .JS, or .C files, in XML format.

Developers can reference the SHPROJ shared project file in their assemblies to include the source files stored in the SHPROJ file. Shared projects are especially helpful for developing cross-platform projects that share the same source code. For example, an SHPROJ file can be used to store source files referenced in the development of a Windows Phone app and a Windows 10 app. NOTE: SHPROJ files cannot be compiled like other Visual Studio project files.