The await operator can only be used within an async method

Question

I have an interface ISFactory as follows.

namespace MyApp.ViewModels
{
    public interface IStreamFactory
    {
        Stream CreateSPStream(strin         


        

Answer 1

The best approach is to make the method async, as the compiler error indicates:

public async Task CreateSerialPortStreamAsync(string serialPortName)

This will require the interface to change as well:

Task CreateSerialPortStreamAsync(string serialPortName);

And yes, all callers of this method will need to be updated.