Checkbox was developed utilizing Visual Studio 2015 and .NET 4.6.1. It is possible that Visual Studio 2013 may work with Checkbox but this has not been tested. Checkbox also requires C# 6.0.
We suggest that any development machine running Checkbox have Visual Studio 2015, .NET 4.6.1, and have a local version of SQL Server ( SQL Express will work ) for debugging and testing purposes.
If you have the SDK or Source Code and require assistance setting up a development environment please submit a support ticket and a member of our support team will be happy to assist you.