Cosmium Cosmium.EmbeddedServer by: Cosmium .NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.1 This package targets .NET Standard 2.1. The package is compatible with this framework or higher. 6,067 total downloads last updated 6/16/2026 Latest version: 0.0.11 In memory Cosmos DB emulation