为什么这个c#程序会在64位24GB内存的计算机上耗尽内存?

这是我的代码:

public class Class1
{
    public int[][] binArray;
    public Class1()
    {
        binArray = new int[1000][];
        for (int i = 0; i < 1000; i++)
        {
            binArray[i] = new int[61608];
        }
    }
}

class Program
{
    static void Main(string[] args)
    {
        Class1 c1 = new Class1();
        Class1 c2 = new Class1();
        Class1 c3 = new Class1();
        Class1 c4 = new Class1();
        Class1 c5 = new Class1();
        Class1 c6 = new Class1();
        Class1 c7 = new Class1();   // Memory will run out at about this point
        Class1 c8 = new Class1();
        Class1 c9 = new Class1();
        Class1 c0 = new Class1();
        Console.WriteLine();
    }
}

Class1用于存储数组，我认为它将获得足够的61608*4字节的内存片段为24GB的内存机器，为什么它仍然抛出一个out of memory exception当我初始化第7类?