How can I use C# 7 on a Web Site project?

Question

How do I output the version of C# an application is using from with C# code (whether it be an MVC app, website or console app).

I have spent a long time searching for this - I just can't find anything on Google - it's strange.

I searched for: "output C# version in code" "how to get C# version of current application" and many others.

Is this even possible?

I want it to output something like "C# version 7" or "5" etc.

Answer 1

You can get your project targeted .NET framework version. Which has been answered in this SO

which version of C# am I using

Just in case

static string version()
    {
        string[] v = typeof(string).Assembly.ImageRuntimeVersion.Replace("v","").Split('.');
            string ver = v[0]+"."+v[1];
            switch(ver)
            {
                case "1.0":
                    return "C# 1.0";
                break;
                case "1.1":
                    return "C# 1.2";
                break;
                case "2.0":
                    return "C# 2.0";
                break;
                case "3.5":
                    return "C# 3.0";
                break;
                case "4.0":
                    return "C# 4.0";
                break;
                case "4.5":
                    return "C# 5.0";
                break; 
                case "4.6":
                    return "C# 6.0";
                break; 
                case "4.6.2":
                    return "C# 7.0";
                break;
                default:
                 return "unknown";
    }
public static void Main(string[] args)
{
  string ver = version();
  Console.Write(ver);
}

Answer 2

Do yo mean assembly file?

System.Reflection.Assembly assembly = System.Reflection.Assembly.GetExecutingAssembly();
FileVersionInfo fvi = FileVersionInfo.GetVersionInfo(assembly.Location);
string version = fvi.FileVersion;