What is your experience with using NoSQL databases in practice?

In practice with C#, I have used NoSQL databases such as MongoDB and Redis. MongoDB was used for storing documents with flexible structures, which is convenient for projects with changing data schemas. Redis was used as a cache and for implementing message queues due to its high speed and support for data structures.

Example of connecting to MongoDB using C# and the MongoDB driver:

var client = new MongoClient("mongodb://localhost:27017");
var database = client.GetDatabase("mydb");
var collection = database.GetCollection<BsonDocument>("mycollection");

var document = new BsonDocument { { "name", "John" }, { "age", 30 } };
collection.InsertOne(document);

This approach allows for quick handling of unstructured data and scaling the application.