I'm beginner in C# programming. I'm struck with this simple program where I want to display the eligible candidates. My question is that how can I store the name of candidate after knowing that he/she is eligible. 

```
    int eligble = 0;    //For counting the eligble Number of candidates

    bool retry;         //For trying until the Number of eligble candidates is reached
    retry = true;
    while (retry)
    {
        string candidatename;   //Intilization for Candidate Name ,Date of Birth ,10th and 12th Percentages
        int tper, twper;
        string  dob;

        Console.WriteLine("Please enter your Name");    //Getting user input values
        candidatename = Console.ReadLine();
        Console.WriteLine("Please enter your date of birth in dd/mm/yyyy format");
        dob = Console.ReadLine();
        DateTime dt = Convert.ToDateTime(dob);
        Console.WriteLine("Please enter your 12th percentange");
        twper = Convert.ToInt16(Console.ReadLine());
        Console.WriteLine("Please enter your 10th percentange");
        tper = Convert.ToInt16(Console.ReadLine());

        int age1 = age(dt);
        if (eligble > 5)        //Checking whether we have selected the Eligble amount of candidates
        {
            Console.WriteLine("We have selected five eligble candidtes");
            retry = false;
            Console.WriteLine("n");
        }
        else
        {
            if (age1 > 20 && twper > 65 && tper > 60)   //Checking Whether the candidate have satisfiyed the Conditions
            {
                eligble += 1;
                string grad = rade(twper, tper);
            }
            else
            {
                eligble -= 1;
            }
        }
    }
}

static int age(DateTime _dt)                                   //Function for calculating the age of the candidate
{
    DateTime n = DateTime.Now;                                  // To avoid a race condition around midnight
    int age = n.Year - _dt.Year;

    if (n.Month < _dt.Month || (n.Month == _dt.Month && n.Day < _dt.Day))
        age--;

    return age;
}

static string rade(int _tper, int _twper)
{
    string grade1;
    int avg= ( _tper+_twper)/ 2;
    if (avg > 90)
    {
         grade1 = "a";
        return grade1;
    }
    else if (avg > 80 && avg < 80)
    {
       grade1 = "b";
        return grade1;
    }
    else if (avg > 70 && avg < 79)
    {
         grade1 = "c";
        return grade1;
    }
    else
    {
         grade1 ="d";
        return grade1;
    }
}

```