[![appveyor build](https://ci.appveyor.com/api/projects/status/github/bitwarden/core?branch=master&svg=true)](https://ci.appveyor.com/project/bitwarden/core/branch/master) [![Join the chat at https://gitter.im/bitwarden/Lobby](https://badges.gitter.im/bitwarden/Lobby.svg)](https://gitter.im/bitwarden/Lobby) # bitwarden Core The bitwarden Core project contains the APIs, database, and other infrastructure items needed for the "backend" of all other bitwarden projects. The core infrastructure is written in C# using .NET with ASP.NET Core. The database is SQL Server. # Contribute Code contributions are welcome! Visual Studio or VS Code is required to work on this project. Please commit any pull requests against the `master` branch. Security audits and feedback are welcome. Please open an issue or email us privately if the report is sensitive in nature.