data access
Azure Cosmos DB for .NET Articles, Tutorials & News
Azure Cosmos DB for .NET articles, tutorials, and news from the DotNetNews archive.
46 articles Updated
Azure Cosmos DB .NET is the focus of this topic page. Azure Cosmos DB for .NET is part of the data-access layer most .NET apps rely on, whether the store is relational or document-oriented. Intermediate and senior .NET developers use this hub to scan practical writing without treating every link as an endorsement.
Recurring subtopics in recent issues include Azure Cosmos DB .NET, Cosmos DB C#, NoSQL Azure .NET, and Cosmos DB SDK. Those themes are drawn from titles and excerpts in the newest archive entries for this tag, not from a marketing outline.
Expect publisher tutorials, release notes, architecture write-ups, and field notes linked from DotNetNews issues. Start here is a short editorial shortlist for Azure Cosmos DB for .NET; the archive list is chronological and larger. Secondary angles such as Azure Cosmos DB .NET and Cosmos DB C# appear when the archive actually covered them. Nearby reading often overlaps with Azure for .NET Developers and Entity Framework Core.
Start here
Editor picks for Cosmos DB
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The Cosmos DB Query That Burned 2 Million RUs Before Lunch
Medium Issue #504
Painful and believable. RU waste stories tend to stick because they show how tiny query choices become production incidents.
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See our new Azure Cosmos DB Design Patterns
Microsoft Dev Blogs Issue #495
Strong reference material for Cosmos teams that need proven modeling approaches instead of learning partitioning lessons the hard way.
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Need a different partition key in Azure Cosmos DB? Pick the right approach
Microsoft Dev Blogs Issue #495
Worth bookmarking if a bad Cosmos partition key is already hurting you and an in-place change is off the table.
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Cosmos DB Shell unlock agentic workflows with MCP toolkit
Medium Issue #493
Interesting crossover of Cosmos DB tooling and MCP-style agent workflows; worth a look if you're experimenting with AI-assisted data access.
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Local Aspire Development with Azure Cosmos DB and the Preview Emulator | BEN ABT
Medium Issue #488
Local Cosmos DB plus Aspire is exactly the kind of developer-loop improvement I want more of.
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What were the limitations of early tools like Script#?
YouTube Issue #464
The title and summary don’t match cleanly, but vector database comparisons are still timely for .NET teams evaluating RAG infrastructure.
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Why I Like Azure Cosmos DB So Much
Medium Issue #459
A personal perspective piece, but it still surfaces why Cosmos DB clicks for certain workloads and developer experience preferences.
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VS Code Live - The Modern Software Product Organization
YouTube Issue #389
Azure Cosmos DB Data Explorer now supports Dark Mode.
Archive
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Newest first
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From an Empty Folder to an AI Agent: Meet create-cosmos-agent
Microsoft Dev Blogs - Sajeetharan Sinnathurai Issue #555
The first few minutes of a new AI project often feel productive. Create a chat endpoint, connect a model, send a prompt, and display the answer. Then the real questions arrive. Where should the agent ...
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Spec-Driven Development comes to Azure Cosmos DB: The First Database Extension for GitHub Spec Kit
Microsoft Dev Blogs - Theo van Kraay Issue #553
AI coding agents can write much of an application's code, but developers still need to review the decisions behind it. For a Cosmos DB application, that includes choosing partition keys, modeling acce...
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Adding Cosmos with Spec Kit & Copilot
YapCast – Jesse Liberty Issue #549
Yesterday I set out to add Cosmos to my demonstration project. The goal was to keep track of all queries, even after the browser is closed. My plan was to work with Spec Kit and Copilot, as described ...
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I Need My CI/CD Pipeline to Access Cosmos DB Without Using a Secret
Microsoft Dev Blogs Issue #544
In the last post we walked through
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Native memory for Microsoft Agent Framework with Azure Cosmos DB
Microsoft Dev Blogs Issue #541
Agents are more useful when they can remember what matters beyond the current conversation. Today, we're announcing a new preview integration that gives Microsoft Agent Framework agents durable, cross...
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MulticloudDB SDK: Cross-cloud portability in the coding agent era
Microsoft Dev Blogs Issue #540
Building cross-cloud solutions with best-of-breed cloud-native databases means learning multiple SDKs, translating queries, handling different errors, and testing across providers. The Multicloud DB S...
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Powering Memory in Foundry Agent Service, with Azure Cosmos DB
Microsoft Dev Blogs Issue #532
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Azure Cosmos DB in the Agentic Era: Data Tools for Developers and AI Agents
Microsoft Dev Blogs Issue #528
Anthropic's 2026 Agentic Coding Trends Report captures an important tension in how developers use AI. Engineers report using AI in roughly 60% of their work, yet say they can fully delegate only 0–20%...
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Query Performance Tuning in Azure DocumentDB: A Practical Guide
Microsoft Dev Blogs Issue #511
Writing a query that works is easy. Writing a query that scales is a different story.
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Native Agent Memory for Microsoft Agent Framework, Powered by Azure Cosmos DB
Microsoft Dev Blogs Issue #508
Recently we introduced the Agent Memory Toolkit
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The Cosmos DB Query That Burned 2 Million RUs Before Lunch
Medium Issue #504
One missing word in a WHERE clause. A dashboard that refreshed every 30 seconds. A throttling storm that made the whole app feel broken —…
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See our new Azure Cosmos DB Design Patterns
Microsoft Dev Blogs Issue #495
Design patterns are where good data modeling lives or dies. In a NoSQL database like Azure Cosmos DB, the difference between a schema that scales to millions of operations per second and one that figh...
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Need a different partition key in Azure Cosmos DB? Pick the right approach
Microsoft Dev Blogs Issue #495
Once you create a container, its partition key is fixed at creation, and you can’t change it in place. However, if your original key starts causing problems like cr
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Cosmos DB Shell unlock agentic workflows with MCP toolkit
Medium Issue #493
Azure Cosmos DB Shell — open-source command-line interface With integrated Model Context Protocol (MCP) server support.
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Local Aspire Development with Azure Cosmos DB and the Preview Emulator | BEN ABT
Medium Issue #488
Distributed applications tend to feel straightforward until a real cloud dependency enters the picture. Azure Cosmos DB is a good example…
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What were the limitations of early tools like Script#?
YouTube Issue #464
Vector Databases for .NET Compared: Azure AI Search, Qdrant, Cosmos DB & pgvector
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Welcome to Azure Cosmos DB Conf 2026
Microsoft Dev Blogs Issue #449
Today is the day. Azure Cosmos DB Conf 2026, in partnership with AMD, is a free virtual developer event focused on building modern, scalable applications with Azure Cosmos DB. The
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7 tips to optimize Azure Cosmos DB costs for AI and agentic workloads
Microsoft Dev Blogs Issue #444
AI apps and agentic workloads expose inefficiencies in your data layer faster than any previous generation of apps. You’re storing embeddings, serving low-latency retrieval, handling bursty traffic fr...
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VS Code Live - The Modern Software Product Organization
YouTube Issue #389
Azure Cosmos DB Data Explorer now supports Dark Mode
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How to Enable Microsoft Entra ID for Azure Cosmos DB (NoSQL)
Microsoft Dev Blogs Issue #387
Strengthen Identity Security and Eliminate Account Keys Identity is becoming the new security perimeter. As organizations modernize their cloud applications, long‑lived secrets and shared keys introdu...
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Accelerate Your Cosmos DB Infrastructure with GitHub Copilot CLI and Azure Cosmos DB Agent Kit
Microsoft Dev Blogs Issue #386
Modern infrastructure work is increasingly agent driven, but only if your AI actually understands the platform you’re deploying. This guide shows how to turn GitHub Copilot CLI into an Azure Cosmos DB...
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Building Intelligent Search with Azure Cosmos DB: Full-Text, Vector, and Hybrid Search
Medium Issue #382
Modern applications demand smarter search capabilities. Users expect to find what they’re looking for even when they don’t use exact…
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Implementing Distributed Caching in Web API with Azure Managed Redis
Medium Issue #381
I’ve worked with caching before — storing AI chat request/response pairs in Cosmos DB to avoid redundant model calls, and caching API…
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Introducing the Azure Cosmos DB Agent Kit: Your AI Pair Programmer Just Got Smarter
Microsoft Dev Blogs Issue #380
The Azure Cosmos DB Agent Kit is an open-source collection of skills that teaches your AI coding assistant (GitHub Copilot, Claude Code, Gemini CLI) expert-level Azure Cosmos DB best practices. Instal...