CardWerk Smart Card API is a software development kit that provides smart card access functionality for developers working in the Microsoft .NET environment. The API supports all .NET programming languages and includes class libraries for smart card integration. The SDK includes sample code in Visual Basic.NET and Visual C# to reduce development time. The API provides managed code for smart card operations and includes events for card insertion and reader presence detection. The library is designed to make applications independent of the underlying smart card reader system. The product includes contactless card classes (CardModules) for various card types including DESFire, iCLASS, Mifare, JavaCard, KVK, eGK, SIM, PIV, CAC, HID Prox, and SEOS. Proprietary reader systems can be supported through custom adapter modules. The API eliminates the need for developers to create their own P/Invoke PC/SC wrapper by providing a convenient interface for smart card operations. The full version of the development kit is available free of charge for evaluation purposes, private use, and non-commercial educational use. A license must be purchased for commercial use or redistribution of runtime files.