C# Code not outputting in console when using lists along with streamwriter

Using C# Console framework and having problems. This code has worked but no longer does. No names are outputted for the if statements. Although the highest, lowest and average score work perfectly. I need to use filler as it wont let me post much code? On a different machine this worked although now nothing outputs. I'm pretty sure its a logic error although it is copied word for word.

using (StreamReader SR = new StreamReader(@"ExamResults.txt"))
{
    List<string> Name = new List<string>();
    List<int> Scores = new List<int>();
    int iNumber = int.Parse(SR.ReadLine());
    int ScoreNumber = 0;
    int Itotal = 0;
    for (int iCounter = 1; iCounter <= iNumber; iCounter++)
    {
        Name.Add(SR.ReadLine());
        ScoreNumber = (int.Parse(SR.ReadLine()));
        Itotal = Itotal + ScoreNumber;
        Scores.Add(ScoreNumber);
    }
    for (int Index = 0; Index <= iNumber; Index++)
    {
        if (Scores[Index] < 49)
        {
            Console.WriteLine(Name[Index] + "Got Grade U");
        }
        if (Scores[Index] > 49 && Scores[Index] + Scores[Index] < 59)
        {
            Console.WriteLine(Name[Index] + "Got Grade E");
        }
        if (Scores[Index] > 59 && Scores[Index] + Scores[Index] < 69)
        {
            Console.WriteLine(Name[Index] + "Got Grade D");
        }
        if (Scores[Index] > 69 && Scores[Index] + Scores[Index] < 79)
        {
            Console.WriteLine(Name[Index] + "Got Grade C");
        }
        if (Scores[Index] > 79 && Scores[Index] + Scores[Index] < 89)
        {
            Console.WriteLine(Name[Index] + "Got Grade B");

        }
        if (Scores[Index] > 89 && Scores[Index] + Scores[Index] < 100)
        {
            Console.WriteLine(Name[Index] + "Got Grade A");
        }

        Console.WriteLine("The average score is: " + Math.Round(Scores.Average()));
        Console.WriteLine("");
        Console.WriteLine("The highest score is: " + Scores.Max() + " belonging to " +
                            Name[Scores.IndexOf(Scores.Max())]);
        Console.WriteLine("");
        Console.WriteLine("The lowest score is: " + Scores.Min() + " belonging to " +
                            Name[Scores.IndexOf(Scores.Min())]);
        Console.Read();