title

i’m trying to program pascal’s triangle in c# and i cant understand whats wrong with the code,

this is what i wrote:

static void Main(string[] args)
{
    int numrows = int.Parse(Console.ReadLine());
    PascalsTriangle(numrows);
}
static void PascalsTriangle(int numRows)
{
    List<int> triangle = new List<int>();
    List<int> trianglestorage = new List<int>();
    Console.WriteLine("   " + string.Join("", triangle));
    for (int i = 0; i < numRows; i++)
    {
        Console.WriteLine();
        triangle.Add(1);
        triangle.Insert(0, 1);
        Console.WriteLine(string.Join(", ", triangle)); // this is the last normal output and the system shows memory overflow error inside the loop. for some reason it goes on forever even though triangle.Count is now 3 and it should repeat only twice 
        for (int j = 0; j < triangle.Count() - 1; j++)
        {
            trianglestorage.Add(triangle[j] + triangle[j+1]);
        }
        triangle = trianglestorage;
    }

}

currently the output is looking like this:

1

1, 1

1, 2, 1

then the program just keeps on going without outputting anything and eventually it closes due to memory overflow