Can you tell about your experience applying the CQRS pattern in projects?

The CQRS (Command Query Responsibility Segregation) pattern separates operations that change state (Commands) and data reading (Queries) into different models and often different stores.

In my experience applying CQRS in C# projects:

• I used CQRS to improve scalability and performance by separating read and write loads.
• I implemented separate models for commands and queries, which simplified support and development.
• I used Event Sourcing together with CQRS, where state changes were stored as events, and projections were updated for queries.
• I employed MediatR to organize command and query handling, which improved readability and testability.

For example, in an order management system, the "Create Order" command was handled separately from the "Get Order Details" query, allowing optimized reading without affecting write logic.

Main advantages:

• Improved scalability
• Clear responsibility separation
• Ability to use different technologies for reading and writing

Disadvantages:

• Increased architecture complexity
• Need for synchronization between models

CQRS is well-suited for complex domains with high performance and scalability requirements.