standards-c-sharp

Avoid blocking when possible

• Increase performance and scalability of your code by avoiding blocking calls.
• A blocking call ties up the thread while it waits for a response. During this time, it could have been doing something more useful, like serving other requests or redrawing the GUI.
• A non-blocking call returns the thread to the threadpool, or keeps the GUI thread responsive, while the task completes.

Don’t

Thread.Sleep(5000); // thread is blocked for 5 seconds

Do

await Task.Delay(5000); // thread can do other stuff for 5 seconds.

Don’t

public void CreateCsv()
{
    using(var writer = File.CreateText("myfile.csv"))
    {
        writer.WriteLine("...");
    }
}

Do

public async Task CreateCsvAsync()
{
    using(var writer = File.CreateText("myfile.csv"))
    {
        await writer.WriteLineAsync("...");
    }
}

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