'await' operator can only be used within an async method with c# exception?

Question

I am using hellosign c# api and when I am calling function for account info using below code

var helloSign = new HelloSignClient("username", "password");
    Account account = await helloSign.Account.GetAsync();
    Console.WriteLine("Your current callback: " + account.CallbackUrl);

I am getting below error.

Error    2    The 'await' operator can only be used within an async method. Consider marking this method with the 'async' modifier and changing its return type to 'Task'.

below is GetAsync method

public async Task<Account> GetAsync()
        {
            AccountWrapper accountWrapper = await helloSignService.MakeRequestAsync<AccountWrapper>(settings.HelloSignSettings.Endpoints.Account.Get);
            return accountWrapper.Account;
        }

this is type of account class

public class Account : AccountCondensedWithRole
    {
        [JsonProperty("callback_url")]
        public string CallbackUrl { get; internal set; }
    }

Can some one tell me how to call this or how to debug this ???

did that signature change recently - could you try a clean build? — Daniel A. White, May 30 '15 at 23:32
@DanielA.White i already did rebuilt.. but not working ... so i thought of posting it .. — nikunjM, May 30 '15 at 23:34
@DanielA.White what does signature change recently means ...??? — nikunjM, May 30 '15 at 23:34

score 3 · Answer 1 · answered May 30 '15 at 23:38

3

The message is pretty clear. This line must be inside a method marked with async:

Account account = await helloSign.Account.GetAsync();

answered May 30 '15 at 23:38

dcastro

66,540
21
145
155

score 3 · Accepted Answer · edited May 31 '15 at 00:08

3

you should wrap this block in Async Method like this

public async Task<Type> MethodAsync(){
    // other code if needed ....
    var helloSign = new HelloSignClient("username", "password");
    Account account = await helloSign.Account.GetAsync();
    Console.WriteLine("Your current callback: " + account.CallbackUrl);
    return type;

}

edited May 31 '15 at 00:08

nikunjM

560
1
7
21

answered May 30 '15 at 23:41

Tchaps

865
7
21

How should I call inside main method, if I want to some return type.. How can i do that can u please explain it to me ?? – nikunjM May 30 '15 at 23:54

score 2 · Answer 3 · edited May 23 '17 at 10:26

2

You can only use await in an async method.

Here's another question to the same problem await operator

edited May 23 '17 at 10:26

Community

1
1

answered May 30 '15 at 23:38

Stefan Szakal

126
1
10

'await' operator can only be used within an async method with c# exception?

3 Answers3