how to name a method starting asyncronious operaton?

Start with async or use verbs like fetch load or get for clarity e.g fetchDataAsync

In .NET, methods that perform asynchronous operations typically return an awaitable type like Task or Task. These methods should end with Async to indicate they can be awaited.

However, if a method starts an asynchronous operation but does not return a Task or Task, then it should not end with Async. Instead, it should use verbs like Begin, Start, etc., to indicate that it kicks off an operation but doesn’t give you a way to await or capture the result directly.

Example:

// This method starts an async operation but does NOT return a Task
public void BeginDownloadFile(string url)
{
    // Starts a background download using a timer, thread, or event-based pattern
    WebClient client = new WebClient();
    client.DownloadFileAsync(new Uri(url), "file.txt");
}

It starts an async operation (DownloadFileAsync) but doesn’t return a Task, so it’s named BeginDownloadFile instead of DownloadFileAsync.

The Right Way to Use Async

Example :

// This method returns a Task and can be awaited
public async Task DownloadFileAsync(string url)
{
    using HttpClient client = new HttpClient();
    var data = await client.GetByteArrayAsync(url);
    await File.WriteAllBytesAsync("file.txt", data);
}

It returns a Task, uses await, and follows the naming convention.