--- title: How to integrate MongoDB with C# | daily.dev description: A hands-on walkthrough shows how to integrate MongoDB into a .NET Core 3.1 API using the official C# driver. It covers installing MongoDB locally or via... canonical: https://daily.dev/posts/how-to-integrate-mongodb-with-c--rftdxknuq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How to integrate MongoDB with C# | daily.dev og:description: A hands-on walkthrough shows how to integrate MongoDB into a .NET Core 3.1 API using the official C# driver. It covers installing MongoDB locally or via... og:url: https://daily.dev/posts/how-to-integrate-mongodb-with-c--rftdxknuq og:image: https://api.daily.dev/og/posts/rfTdxKnuQ.png og:image:alt: How to integrate MongoDB with C# og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How to integrate MongoDB with C# **[Code4IT](https://daily.dev/sources/code4it)** · 15 min read · 0 upvotes · 0 comments ## Summary A hands-on walkthrough shows how to integrate MongoDB into a .NET Core 3.1 API using the official C# driver. It covers installing MongoDB locally or via Docker/Atlas, understanding the document-collection-database-host hierarchy, setting up a POCO model with BsonId and BsonElement attributes, and implementing full CRUD operations (insert, get by ID, complex filters with Lte/Gte/And, update, and delete) using MongoClient, filter builders, and update definitions. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How do I perform CRUD operations on MongoDB using C#? Use the official MongoDB.Driver NuGet package to create a MongoClient from a connection string, then call GetDatabase and GetCollection to get a typed collection reference. Insert documents with InsertOne, query with FindAsync using Builders.Filter (Eq, Lte, Gte, And), update with UpdateOneAsync and Builders.Update.Set, and delete with DeleteOneAsync. _daily.dev surfaces practical driver walkthroughs for developers wiring MongoDB into .NET APIs._ ### How does MongoDB handle document IDs in C# and can I use a custom ID instead of ObjectId? By default MongoDB stores IDs in a field called _id, mapped in C# to a property named Id of type ObjectId. To use a custom ID type instead, remove the ObjectId property and decorate your chosen field with the [BsonId] attribute, for example a string field populated manually, such as a formatted timestamp. _developers choosing between ObjectId and custom ID schemes can compare approaches via daily.dev._ ## Similar posts on daily.dev - [Getting Started with MongoDB: A Complete Beginner’s Guide from SQL to NoSQL](https://daily.dev/posts/getting-started-with-mongodb-a-complete-beginner-s-guide-from-sql-to-nosql-tshnywr60) · Medium · 2 upvotes · 0 comments - [How To Use the MongoDB Shell](https://daily.dev/posts/how-to-use-the-mongodb-shell-ryqw7snmb) · DigitalOcean Community · 0 upvotes · 0 comments - [Querying Data in MongoDB With Laravel: From Basics to Advanced Techniques](https://daily.dev/posts/querying-data-in-mongodb-with-laravel-from-basics-to-advanced-techniques-yv3gxynj9) · Laravel News · 0 upvotes · 0 comments - [Azure DocumentDB \(with MongoDB compatibility\) for Banking: A Modern Customer 360 Approach](https://daily.dev/posts/azure-documentdb-with-mongodb-compatibility-for-banking-a-modern-customer-360-approach-dmub3bs08) · DevBlogs · 0 upvotes · 0 comments - [How to Build a Search Service in Java with MongoDB](https://daily.dev/posts/how-to-build-a-search-service-in-java-with-mongodb-gggtexmhv) · Foojay.io · 1 upvotes · 0 comments --- Tags: [#backend](https://daily.dev/tags/backend), [#.net](https://daily.dev/tags/.net), [#c#](https://daily.dev/tags/c#), [#mongodb](https://daily.dev/tags/mongodb) [View this post on daily.dev](https://daily.dev/posts/how-to-integrate-mongodb-with-c--rftdxknuq) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How to integrate MongoDB with C#","url":"https://daily.dev/posts/how-to-integrate-mongodb-with-c--rftdxknuq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-to-integrate-mongodb-with-c--rftdxknuq"},"datePublished":"2026-10-04T13:05:41.152Z","dateModified":"2026-10-04T13:18:34.535Z","description":"A hands-on walkthrough shows how to integrate MongoDB into a .NET Core 3.1 API using the official C# driver. 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