Cannot create an async Main

Question

I'm trying to make the Main async, so I tried:

class Program
{
    static async Task Main(string[] args)
    {
        Books books = new Books();
        await books.AddBooksAsync();
    }
}

where AddBooksAsync have this structure:

public async Task AddBooksAsync()
{
  //some contents
}

I get this error:

Does not contain a static 'main' method suitable for an entry point

Answer 1

Your visual studio by default will be setted to this Which means that the major version will be 7.0 and not 7.1 you should force it to 7.1 in order to compile it with the 7.1 version

The second option in Project Properties=> Build =>advanced set the language version to C# latest minor version(latest)

Answer 2

Add this in your csproj.

<PropertyGroup>
    <LangVersion>latest</LangVersion>
</PropertyGroup>