Multithreading in .NET Core

There are many benefits in using multithreading in CPU and/or I/O-bound applications. It is often used for long-running processes that have a longer or infinite lifetime, working as background tasks, keeping the main thread available in order to manage or handle user requests. However, unnecessary use may completely degrade the application's performance. There are cases where creating too many threads is not a good architecture practice.

Here are some examples where multithreading is a good fit:

• I/O operations
• Running long-running background tasks
• Database operations
• Communicating over a network

Multithreading caveats

Although there are many benefits to multithreading, there are some caveats that need to be thoroughly addressed when writing multithreaded applications. If the machine is a single or two-core machine and the application is creating lots of threads, the context switching between these threads will slow the performance:

The preceding diagram depicts the program...