Quick Answer

Write non-blocking code with async/await.

Understanding the Issue

The async/await pattern simplifies asynchronous programming. async marks a method as asynchronous, await pauses execution until the awaited task completes without blocking the thread.

The Problem

This code demonstrates the issue:

Csharp Error 
// Need to call async method without blocking

The Solution

Here's the corrected code:

Csharp Fixed 
public async Task<string> FetchDataAsync() 
{
    using HttpClient client = new();
    return await client.GetStringAsync("https://api.example.com");
}

// Consuming
public async void Button_Click(object sender, EventArgs e)
{
    try {
        string data = await FetchDataAsync();
        Console.WriteLine(data);
    }
    catch (Exception ex) {
        Console.WriteLine($"Error: {ex.Message}");
    }
}

Key Takeaways

Always await async calls and handle exceptions properly.