mvcaspasynccalls.cs

[RoutePrefix("some")]
public class SomeController :ApiController{
  
  [HttpGet]
  [Route("test")]
  public IHttpActionResult Test(){
    Repo repo  = new Repo();
    var task = repo.GetAll();
    task.Wait(); //Im sure this was working in the previous versions but is not now.
    var allEmps = task.Result; // here it gets lost and has no clue how to come back to this promise
    return Ok<List<Employee>>(allEmps)
  }
}

public class Repo {
  public async Task<Employee> GetAll(){
    //some task here and it woudl be asynchronous 
  }
}

public class Employee{
  //a couple of properties here
}

mvcaspasynccallsworking.cs

[RoutePrefix("some")]
public class SomeController :ApiController{
  
  [HttpGet]
  [Route("test")]
  public Task<IHttpActionResult> Test(){
    Repo repo  = new Repo();
    return Ok<List<Employee>>(await repo.GetAll()); //and now since the action itself is async , this works
    //very funny its either I have not understood threading in .NET or that MS has changed a few nuts and bolts underneath
  }
}

public class Repo {
  public async Task<Employee> GetAll(){
    //some task here and it woudl be asynchronous 
  }
}

public class Employee{
  //a couple of properties here
}