jesuscampos

public interface MyInterface
{
    Task<int> GetMagicNumber();
}

public class MyClass : MyInterface
{
    public Task<int> GetMagicNumber()
    {
        return Task.FromResult(3);

jesuscampos

private async Task<string> DoWorkAsync()
{
  HttpClient client = new HttpClient();
  string result1 = await client.GetStringAsync(url1);
  // ...
  string result2 = await client.GetStringAsync(url2);
  // ...
  string result3 = await client.GetStringAsync(url3);
  // ...
  return $"Results: {result1}{result2}{result3}";

jesuscampos

private async Task<string> DoWorkAsync()
{
  HttpClient client = new HttpClient();
  string result = await client.GetStringAsync(url);
  return $"Result: {result}";
}

jesuscampos

private async Task DoWorkAsync()
{
  // Comienza a ejecutarse como un método síncrono
  HttpClient client = new HttpClient();
  // await [Task]: se inicia la operación asíncrona y se suspende
  // la ejecución del resto del código
  await client.GetStringAsync(url);
  // resto del código
  // ... se ejecutará cuando la tarea asíncrona se complete
  // ...

jesuscampos

public class HomeController: Controller
{
  public IActionResult Get()
  {
    var result = DoWork(100);
    return View(result);
  }
  
  public long DoWork(int n)
  {

jesuscampos

/// <summary>
/// Este método está vinculado a la CPU. Si se usa desde una
/// UI utilizar Task.Run para no bloquear la interfaz
/// <summary>
void DoWork()
{
  //... CPU-Bound work
}

jesuscampos

public long DoWork(int n)
{
  // CPU-Bound work
  // ...
  return fibonacciNumber;
}

public Task<long> DoWorkAsync(n)
{
    return Task.Run(() => DoWork(n));

jesuscampos

public class HomeController: Controller
{
  public IActionResult GetAsync()
  {    
    var result = DoWork(100);
    return View(result);
  }
}

jesuscampos

public class HomeController: Controller
{
  public async Task<IActionResult> GetAsync()
  {    
    var result = await DoWork(100);
    return View(result);
  }
  
  public Task<long> DoWork(int n)
  {

jesuscampos

public long DoWork(int n)
{
  // CPU-Bound work
  // ...
  return fibonacciNumber;
}