Rename Sample `.txt` to `.cs`

RenameTxt2Cs.csx

#!/usr/bin/env dotnet-script
/**
 * Rename Sample .txt to .cs
 */

if (Args == null || Args.Count < 0)
{
    Console.WriteLine("Require arguments");
    return;
}

var dirPath = Args[0];
var files = Directory.GetFiles(".", "*.txt");
foreach(var filePath in files)
{
    var dirPath = Path.GetDirectoryName(filePath);
    var fileNameWithoutExtension = Path.GetFileNameWithoutExtension(filePath);
    var newPath = $"{dirPath}/{fileNameWithoutExtension}.cs";
    File.Move(filePath, newPath);
}