Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    public class FlashCard
    { //class open
            public string question;
            public string answer;
            public string userinput;


            public void Create()
            {  //create open
                Console.WriteLine("Enter your question");
                question = Console.ReadLine();
                Console.WriteLine("What is the answer to the question?");
                answer = Console.ReadLine();

            } //create close

            public override string ToString()
            { //string to string open
                // using StringBuilder here just because it's more performant than normal string concatenation
                var stringBuilder = new StringBuilder();

                stringBuilder.AppendLine("Flashcard");
                stringBuilder.AppendLine("------------------------------------");
                stringBuilder.AppendLine("Q: " + question);
                stringBuilder.AppendLine("A: " + answer);
                stringBuilder.AppendLine("UserInput: " + userinput);

                // You can see that StringBuilder also uses its own implementation for ToString() that does the performant concatenation.
                return stringBuilder.ToString();
            } //string to string close
        } //class close


    } //namespace close