get return value of an async method in csharp

In order to get the return value of an async method in C#, you need to use the async and await keywords.

When you mark a method as async, you're telling the compiler to generate code that allows the method to execute asynchronously. This means that the method will not block the calling thread while it is running.

The return type of an async method is typically Task<T> or ValueTask<T> where T is the type of the return value.

To get the return value of an async method, you can use the await keyword to wait for the method to complete and then retrieve the result.

Here's an example:

main.cs
async Task<int> MyAsyncMethod()
{
    return 42;
}

async Task MyCallingMethod()
{
    int result = await MyAsyncMethod();
    Console.WriteLine($"The result is {result}");
}
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In this example, MyAsyncMethod is marked as async and returns an int. MyCallingMethod calls MyAsyncMethod and uses the await keyword to wait for it to complete. Once MyAsyncMethod has completed, the result is stored in result and printed to the console.