Quick Answer

Handle operation timeouts.

Understanding the Issue

Occurs when an operation exceeds its allotted time, common in network and async operations.

The Problem

This code demonstrates the issue:

Csharp Error 
var client = new HttpClient();
client.Timeout = TimeSpan.FromSeconds(1);
await client.GetAsync("slow-website.com"); // Throws

The Solution

Here's the corrected code:

Csharp Fixed 
// Solution 1: Catch and retry
try {
    await client.GetAsync(url);
} catch (TimeoutException) {
    // Retry logic
}

// Solution 2: Configure timeout per request
var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5));
await client.GetAsync(url, cts.Token);

// Solution 3: Use WhenAny with delay
var downloadTask = client.GetAsync(url);
var timeoutTask = Task.Delay(5000);
var completed = await Task.WhenAny(downloadTask, timeoutTask);
if (completed == timeoutTask) {
    // Handle timeout
}

// Solution 4: Polly retry policy
var policy = Policy
    .Handle<TimeoutException>()
    .WaitAndRetryAsync(3, _ => TimeSpan.FromSeconds(1));
await policy.ExecuteAsync(() => client.GetAsync(url));

// Solution 5: Adjust timeout settings
client.Timeout = TimeSpan.FromSeconds(30);

Key Takeaways

Implement proper timeout handling and retry logic for unreliable operations.