adamelfstrom Fortnox.NET.SDK by: davidulvmoen adamelfstrom .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. 996,206 total downloads last updated 1/22/2026 Latest version: 4.5.0 Fortnox SDK API Client C# .NET REST Softwerk SDK package for Fortnox API. This package is developed and maintained by Softwerk AB. For more information please visit the repository on Github.