AsyncExamples.cs

AsyncExamples.cs

using System.Net.Http;
using System.Threading.Tasks;

public class AsyncExamples
{
    // GOOD EXAMPLE
    // This method performs an asynchronous operation and hence uses async and await appropriately.
    public async Task<string> GetDataAsync()
    {
        HttpClient client = new HttpClient();
        
        // The following line makes an asynchronous call to get data from the web.
        // Using await here ensures that the method yields control and doesn't block the caller while waiting.
        string data = await client.GetStringAsync("https://example.com/data");
        
        return data;
    }
    
    // BAD EXAMPLE
    // This method does not have any asynchronous operations, yet it's marked as async.
    // This introduces unnecessary overhead due to the compiler-generated state machine.
    public async Task<string> GetStaticMessageAsync()
    {
        // The method simply returns a static string without any asynchronous operations.
        // The async keyword is redundant here.
        return "Hello, World!";
    }
}

// In summary: 
// 1. When a method genuinely benefits from being asynchronous, use the async and await keywords together.
// 2. If a method doesn't have any asynchronous operations, avoid marking it as async.