c# - 如何返回异步 IEnumerable？

Question

我有以下方法:

public async IEnumerable<string> GetListDriversAsync()
{
   var drives = await graphClient.Drive.Root.Children.Request().GetAsync();
        foreach (var d in drives)
            yield return d.ToString(); 
}

但是编译器错误说:

"The return type of an async must be void, Task or Task <T>"

当方法为异步时如何返回 IEnumerable？

Answer 1

尝试这个:

public async Task<IEnumerable<string>> GetListDriversAsync()
{
    var drives = await graphClient.Drive.Root.Children.Request().GetAsync();

    IEnumerable<string> GetListDrivers()
    {
        foreach (var d in drives)
            yield return d.ToString();
    }

    return GetListDrivers();
}