https://heikoluxenhofer.dev In-depth articles on Microsoft Azure, AI, .NET, software architecture, and modern software engineering by Heiko Luxenhofer. en-us Sun, 25 Oct 2026 13:29:49 GMT https://heikoluxenhofer.dev/blog/checksum-verify https://heikoluxenhofer.dev/blog/checksum-verify A small open-source Windows tool that checks a download's checksum from the right-click menu. This post covers why checksums matter and how the tool is built with .NET and WinUI 3. Mon, 12 Oct 2026 00:00:00 GMT dotnet c# windows security winui3 https://heikoluxenhofer.dev/blog/secure-mcp-server https://heikoluxenhofer.dev/blog/secure-mcp-server A tour of a real .NET Aspire MCP server repo — API key auth, scope- and role-based Entra ID authorization per tool, an on-behalf-of downstream API call, and policy-driven agent governance. Wed, 22 Jul 2026 00:00:00 GMT dotnet c# mcp security aspire