Fix S1144: False positive on async Main

[nnpcYvIVl]

A false positive S1144 is thrown on the line:

static async Task Main(string[] args)

In C# 7.1 this is a valid entrypoint method. https://blogs.msdn.microsoft.com/mazhou/2017/05/30/c-7-series-part-2-async-main/

using System;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static async Task Main(string[] args)
        {
            Console.WriteLine("Test");
        }
    }
}

[valhristov]

Hi @nnpcYvIVl, thanks for the feedback, we will fix this issue once we start working on C# 7 in the near future.

[RowlandShaw]

I've started seeing this again with version 4.5.0.3786

[valhristov]

Hi @RowlandShaw, is the project you are seeing this error connected to a SonarQube instance? If yes, even with the latest SonarLint, you could be using the analyzers which are installed on SonarQube.

Could you please check if you have SonarAnalyzer.CSharp nuget package referenced in your project. If yes, what's its version?

If you are not connected, or if you are using the latest version, could you please send us a simple reproducer application, because we are unable to see issues with the code snippet in the original ticket.

[RowlandShaw]

One thing I did notice was making the class static resolved the issue

[valhristov]

Hi @RowlandShaw, I am unable to reproduce the problem with the latest version of SonarC#, could you please open a new issue and provide a simple code snippet that triggers the rule? Thank you in advance!