调试时，为什么visual studio说中位数是一个未分配的变量?回答

所以，我正在尝试制作一个分析数据的控制台程序(好吧)。问题是，当我去打印中位数时，它告诉我它是未分配的(调试器实际上是这么说的)。我做错了什么?使用系统;

using System;
class midpointFormula
{
    static void Main()
    {
    double min, max, range, median, quartile1, quartile3, internalQuartileRange, IQR15;
    int dataPoints, dataPoints1, count, count1;
    double[] dataSet;
    bool isEven;
    count = 0;
    Console.WriteLine("This program allows you to find several diffrent values from the data");
    Console.Write("Please enter the amount of data points you would like to use: ");
    dataPoints = int.Parse(Console.ReadLine());
    dataPoints1 = dataPoints - 1;
    dataSet = new double[dataPoints];
    #region Enter Data
    while (count < dataPoints)
    {
        count1 = count + 1;
        Console.Write("Please enter the {0} datapoint: ", count1);
        dataSet[count] = double.Parse(Console.ReadLine());
        ++count;
    }
    #endregion
    min = dataSet[0];
    max = dataSet[dataSet.Length - 1];
    range = max - min;

    #region Even Check
    if (dataPoints % 2 == 0)
    {
    isEven = true;
    }
    else
    {
    isEven = false;
    }
    #endregion
    if (isEven == true)
    {
        int medianPoint;
        medianPoint = (dataPoints / 2) - 1;
        median = dataSet[medianPoint];

    }
    else

    #region Output
    Console.WriteLine("Minimum is : {0}", min);
    Console.WriteLine("Maximum is : {0}", max);
    Console.WriteLine("Range is   : {0}", range);
    Console.WriteLine("Median is  : {0}", median);
    #endregion
    Console.ReadKey();
}

}

注意:是的，我知道如果数据点数量不均匀，它将不计算数据点，我仍在努力。