2 talks mention this tool across 2 BSides chapters.
.NET Core is a free, open-source framework for building and running applications across Windows, Linux, and macOS. It powers everything from web services to command-line tools and is commonly used by both offensive and defensive security teams to develop custom tooling and automation.
Red teamers and penetration testers use .NET Core to build portable payloads, post-exploitation frameworks, and red team infrastructure that can run across different operating systems without major rewrites. Blue teamers and defenders leverage it for security automation, threat modeling applications, and custom detection tools. The framework's cross-platform nature and strong typing make it attractive for security work where reliability and maintainability matter—especially when teams need to share tools across heterogeneous environments or scale operations through DevOps practices.