Error while compiling in Visual Studio 2015

[thanhcong2k7]

When I copy the code converted from website, paste it into my code and compile, it showed up error like this:
CS4033 : 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'.
Code:

using (var httpClient = new HttpClient())
                {
                    using (var request = new HttpRequestMessage(new HttpMethod("POST"), "http://localhost/"))
                    {
                        var multipartContent = new MultipartFormDataContent();
                        multipartContent.Add(new StringContent(user + " " + timehour + timeday + " " + chatBox.Text),"content");
                        request.Content = multipartContent;

                        var response = await httpClient.SendAsync(request); //Error here
                    }
                }

(Sorry if my English was bad :< )

[olsh]

Hi @thanhcong2k7,

Yes, the converter generates code that uses C# v5 features like async/await.
So you should migrate your project to .NET Framework 4.5 or newer. Visual Studio 2015 supports .NET Framework 4.5.