ConfigureAwait behavior in C Sharp (C#) - Mini Project: Build & Apply

Understanding ConfigureAwait Behavior in C#

📖 Scenario: Imagine you are building a simple console app that fetches data asynchronously. You want to understand how ConfigureAwait affects where the continuation runs after an await.

🎯 Goal: You will create an asynchronous method that simulates data fetching, then use ConfigureAwait to control whether the continuation runs on the original context or not. Finally, you will print messages to see the effect.

📋 What You'll Learn

Create an async method called FetchDataAsync that returns a string after a delay

Create a boolean variable called continueOnCapturedContext to control ConfigureAwait

Use ConfigureAwait(continueOnCapturedContext) when awaiting the delay

Print messages before and after awaiting to observe thread behavior

💡 Why This Matters

🌍 Real World

Understanding ConfigureAwait helps developers write responsive UI apps and efficient server code by controlling where async continuations run.

💼 Career

Many C# developer roles require knowledge of async programming and ConfigureAwait to avoid common bugs and improve app performance.

1

Create the async method FetchDataAsync

Write an async method called FetchDataAsync that waits 1000 milliseconds using Task.Delay(1000) and then returns the string "Data fetched".

C Sharp (C#)

// Your code here

Need a hint?

Use async Task<string> for the method signature and await Task.Delay(1000) inside the method.

2

Add the continueOnCapturedContext boolean variable

Inside the Program class, add a public static boolean variable called continueOnCapturedContext and set it to false.

C Sharp (C#)

using System.Threading.Tasks;

public class Program
{
    // Your code here

    public static async Task FetchDataAsync()
    {
        await Task.Delay(1000);
        return "Data fetched";
    }
}

Need a hint?

Declare continueOnCapturedContext as a public static bool and set it to false.

3

Use ConfigureAwait with continueOnCapturedContext

Modify the FetchDataAsync method to use ConfigureAwait(continueOnCapturedContext) after Task.Delay(1000).

C Sharp (C#)

using System.Threading.Tasks;

public class Program
{
    public static bool continueOnCapturedContext = false;

    public static async Task FetchDataAsync()
    {
        // Your code here
        await Task.Delay(1000);
        return "Data fetched";
    }
}

Need a hint?

Use ConfigureAwait(continueOnCapturedContext) right after Task.Delay(1000).

4

Print messages to observe ConfigureAwait effect

Add a Main method that prints "Starting fetch", calls FetchDataAsync() with await, prints the returned data, and then prints "Fetch complete". Use continueOnCapturedContext = false before calling FetchDataAsync.

C Sharp (C#)

using System;
using System.Threading.Tasks;

public class Program
{
    public static bool continueOnCapturedContext = false;

    public static async Task FetchDataAsync()
    {
        await Task.Delay(1000).ConfigureAwait(continueOnCapturedContext);
        return "Data fetched";
    }

    // Your code here
}

Need a hint?

Use Console.WriteLine to print messages before and after awaiting FetchDataAsync().