await operator can only be used with async methods?

Question

Hi I have created an async method is c# to get all projects from VSTS.

Here is how the defenition looks like

public async Task<string> GetProjects()
{
    try
    {
        return r;
    }
    catch
    {
        return "";
    }
}

But when I tries to get the return value from it, it says The await operator can only be used with Async methods.. I didnt understand it since Im new to these async and await methods. The way I tried to access is like this

string s;

s=await GetProjects();

You probably do `s=await GetProjects();` in non-async method. You can only use `await` in an `async` method. — qwermike, Dec 31 '18 at 08:45
https://stackoverflow.com/questions/17488677/how-does-await-async-work-in-c-sharp — Peter Bons, Dec 31 '18 at 08:45
Thanks @MikeKaskun for pointing me that.. Yea, mine was not an async method, I was not aware the calling function also has to be async. — Sandeep Thomas, Dec 31 '18 at 08:50

score 2 · Answer 1 · answered Dec 31 '18 at 08:49

2

If you desperately need to have an async method, you can do it like this:

return Task.FromResult("");

However, you should really read this as @PeterBons suggested

answered Dec 31 '18 at 08:49

Nick

4,787
2
18
24

score 0 · Answer 2 · answered Jan 21 '19 at 06:34

0

If your method uses await, it must be marked as async. You can read here why: https://blogs.msdn.microsoft.com/ericlippert/2010/11/11/asynchrony-in-c-5-part-six-whither-async/

answered Jan 21 '19 at 06:34

haimb

381
3
4

await operator can only be used with async methods?

2 Answers2