The return type of an async method must be void, Task or Task in C#

Question

I have the following method and getting the following error. I wonder how could I able to overcome on this issue.

The return type of an async method must

Answer 1

The rule is simple: if your "regular" synchronous method would return T, your async method must return Task<T>:

private static async Task<T> GoRequest<T>(string url, Dictionary<string, object> parameters, HttpMethod method,string body = "")
        where T : class

You don't need to change anything else: when your async code returns a T, the compiler makes sure that the result is actually a Task<T>.

Note: Since your async method has no awaits in it, you might as well change it to a "regular", synchronous, method.

Answer 2

You need to wrap your return type in a Task.

private static async Task<T> GoRequest<T>(string url, Dictionary<string, object> parameters, HttpMethod method, string body = "")
    where T : object