Which language this code written with?

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//PlayGround has "Time limit exceeded" Error. Password Lenght must be +- 10 chars.
namespace SoloLearn
{
class Program
{
static void Check(string pch, string charset)
{
charset.Split(new[] { ',' }).ToList<string>()

Answer 1

C# 😎

Answer 2

English