Bits of .NET

⚡ Async/Await = Responsive Apps

Blocking calls freeze UI. Async/Await makes I/O operations non-blocking. Responsive, scalable.

📝 Async Examples

// Basic async method
public async Task GetUserAsync(int id)
{
    return await _dbContext.Users.FindAsync(id);
}

// Error handling
public async Task GetUserWithErrorAsync(int id)
{
    try
    {
        return await _dbContext.Users.FindAsync(id);
    }
    catch (Exception ex)
    {
        _logger.LogError(ex, "Error getting user");
        throw;
    }
}

// Parallel operations
public async Task GetUserSummaryAsync(int userId)
{
    var userTask = _userService.GetUserAsync(userId);
    var ordersTask = _orderService.GetUserOrdersAsync(userId);
    var reviewsTask = _reviewService.GetUserReviewsAsync(userId);
    
    await Task.WhenAll(userTask, ordersTask, reviewsTask);
    
    return new UserSummary
    {
        User = userTask.Result,
        Orders = ordersTask.Result,
        Reviews = reviewsTask.Result
    };
}

// Cancellation
public async Task GetUserWithCancellationAsync(
    int id, CancellationToken cancellationToken)
{
    return await _dbContext.Users
        .FindAsync(new object[] { id }, cancellationToken);
}

// Async Tips
- Use async for I/O operations
- Avoid async void (except events)
- Use ConfigureAwait(false) in libraries
- Handle exceptions properly
- Use CancellationToken for timeouts

💡 Async Tips

• Use async for I/O operations
• Avoid async void (except events)
• Use ConfigureAwait(false) in libraries
• Handle exceptions properly
• Use CancellationToken for timeouts