When creating a new function version the builder automatically installs all declared dependencies required for the function to run. For more information about the requirements and restrictions, see Building and managing dependencies.
The runtime environment automatically loads your code and invokes the request handler you specified. It receives an incoming request and the invocation context as arguments. The context contains additional information about the function parameters.
Cloud Functions automatically captures an application's standard output streams and sends them to the centralized logging system available in Yandex.Cloud. This system also logs service records about the start and end of each function and any errors that occur during its execution. For more information about the log format, see Logging.
If you want to learn more about how to write in C# or how certain statements work, we recommend taking a basic course on Stepik.