Something on C#

String sFirstname;
String sSurname;
String sTellme;
String sResponse;
String [] sQuestion;
String sFullname;
String sPlayerAnswer;
int iMark=0;
int iScore = 0;
int iIndex;
int iNum;
Console.Write(“How many questions do you want to enter?”);
iIndex = Convert.ToInt32(Console.ReadLine());
Console.WriteLine();
sQuestion=new String [iIndex];
String[] sAnswer = new String[iIndex];
Console.Write(“What’s your first name?”);
sFirstname = Console.ReadLine();
Console.WriteLine();
Console.Write(“What’s your surname?”);
sSurname = Console.ReadLine();
Console.WriteLine();
Console.Write(“Your name is: ” + sFirstname + ” ” + sSurname);
Console.WriteLine();
Console.WriteLine();
Console.Write(“Are you ready to input questions via the console? Enter yes or no in small letters.”);
sResponse = Console.ReadLine();
Console.WriteLine();
if (sResponse == “yes”)
{
for (iNum = 0; iNum < iIndex; iNum++)
{
Console.Write(“What’s the question?”);
sQuestion[iNum] = Console.ReadLine();
Console.Write(“What’s the answer?”);
sAnswer[iNum] = Console.ReadLine();
}
} else
{
Console.Write(“Okay. Thank you. Bye! Press any key to close.”);
}
Console.Clear();
Console.Write(“What’s your full name?”);
sFullname = Console.ReadLine();
Console.WriteLine();
Console.Write(“Do you want to play my game? Enter yes or no in small letters.”);
sTellme = Console.ReadLine();
while(sTellme == “yes”)
{
for (iNum = 0; iNum < iIndex; iNum++)
{
Console.Write(sQuestion[iNum]);
sPlayerAnswer = Console.ReadLine();
Console.WriteLine();
if (sPlayerAnswer == sAnswer[iNum])
{
iMark++;

                }
                else
                {
                    iMark--;

                }
                iScore = iMark;
            }
            Console.WriteLine();
            Console.Write("Your name is:    " + sFullname + " and your score is:    " + iScore + " out of:   " + iIndex + "  questions.");
            Console.WriteLine();
            Console.Write("Do you want to play my game? Enter yes or no in small letters.");
            sTellme = Console.ReadLine();
        }
      Console.ReadKey();

    }