C# for scripting (csx) location of script file

Question

In F# it's rather easy with predefined identifier __SOURCE_DIRECTORY__ https://stackoverflow.com/a/4861029/2583080

However this identifier does not work in C# scripting (csx files or C# Interactive).

> __SOURCE_DIRECTORY__

(1,1): error CS0103: The name '__SOURCE_DIRECTORY__' does not exist in the current context

Getting current directory in more traditional way will not work either.

1. Directory.GetCurrentDirectory()

   Returns: C:\Users\$USER_NAME$\

2. new Uri(System.Reflection.Assembly.GetExecutingAssembly().CodeBase).LocalPath;

   Returns: C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE\CommonExtensions\Microsoft\ManagedLanguages\VBCSharp\InteractiveComponents\

Answer 1

In C# you can take advantage of caller information attributes (available since C# 5 / VS2012). Just declare a method like this:

string GetCurrentFileName([System.Runtime.CompilerServices.CallerFilePath] string fileName = null)
{
    return fileName;
}

And call it without specifying the optional parameter:

string scriptPath = GetCurrentFileName(); // /path/to/your/script.csx