Question 1

How to connect MongoDB to an ASP.NET Core application?

Accepted Answer

Install the MongoDB.Driver NuGet package, add a MongoClient in your Startup.cs with the connection string, and inject IMongoDatabase or IMongoCollection into your services. Use dependency injection to manage the client lifecycle for efficient resource handling.

Question 2

MongoDB C# driver vs Entity Framework Core for .NET?

Accepted Answer

Use the MongoDB C# driver when working with MongoDB's document model and needing features like change streams or aggregation. Entity Framework Core is better for relational databases with LINQ to SQL, but for MongoDB, the official driver is essential for full compatibility and performance.

Question 3

How to map nested objects in MongoDB C# driver?

Accepted Answer

Define C# classes with properties matching your document structure, including nested classes. The driver automatically serializes and deserializes using BSON, but you can use attributes like BsonElement for custom mappings if field names differ.

Question 4

Is the MongoDB C# driver thread-safe?

Accepted Answer

Yes, MongoClient is thread-safe and designed to be shared across multiple threads. However, individual operations should be handled with care in concurrent scenarios, and async methods are recommended for better scalability and error handling.

Question 5

How to use change streams in MongoDB with C#?

Accepted Answer

Call the Watch method on a collection or database to get an IChangeStreamCursor. Subscribe to changes and process events asynchronously, ideal for real-time applications like notifications or data synchronization, as supported by the driver's API.

mongo-csharp-driver

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