How can you implement a method so that it does not stop the main application from working?

To make a method execute asynchronously and not block the main thread of the application, in C# you can use the keywords async and await together with tasks (Task). This allows long-running operations to run in the background.

Example:

public async Task LongRunningMethodAsync()
{
    await Task.Run(() => {
        // Long operation
        Thread.Sleep(5000);
    });
}

// Call from the main thread
await LongRunningMethodAsync();

If you do not want to wait for completion, you can simply call the method without await, and it will run in parallel without blocking the main thread.