সি# Keys

using System;
namespace MyApplication {
  class Program {
    static void Main(string[] args) {

    Dictionary<string, string> user = new() {
      {"নাম", "মোঃ আরিফ"},
      {"দেশ", "বাংলাদেশ"}
    };

    var result = user.Keys;

    foreach (var key in result) {
      Console.WriteLine(key);
    }

    }
  }
}