async for in csharp

To use async-await with a for loop in C#, you can make use of the Parallel.ForEach method which is part of the System.Threading.Tasks namespace.

Parallel.ForEach is a parallel replacement for the standard foreach loop. It uses a ThreadPool internally to run the iteration in parallel, and it supports async-await functionality.

Here's an example implementation of for loop using async-await:

main.cs
using System.Threading.Tasks;

public async Task ProcessItems(IEnumerable<string> items)
{
    await Task.Run(() =>
    {
        Parallel.ForEach(items, (item) =>
        {
            //Async code here
        });
    });
}
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In this example, the items IEnumerable is iterated over asynchronously using Parallel.ForEach. Within the lambda expression block passed to the Parallel.ForEach method, you can write your asynchronous code.

It's important to note that it's recommended to use ConfigureAwait(false) in any asynchronous code that doesn't need to execute on the original synchronization context. This could help to prevent deadlocks and improve performance.

main.cs
Parallel.ForEach(items, async (item) =>
{
    await ProcessItemAsync().ConfigureAwait(false);
});
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