How do I transform this code into a 2d array

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C#7.0

this is my current code i applayed static 2d array and wanna load my data inside it from a csv file. The csv file contains 2000 rows and 60 columns so i need to do it with a for loop but i cant get the csv data to display it and get it inside the columns to. Now all the double numbers come underneath eachother but they need in rows of 60 double numbers. Can anyone help me get this loop to work and put the csv data inside a 2D array.

What I have tried:

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using System.Windows;
using System.Windows.Controls;

namespace Test_INotifyPropertyChanged
{
/// <summary>
/// Interaktionslogik für MainWindow.xaml
///
public partial class MainWindow : Window
{
public ObservableCollection<string> stuff { get; set; }
public MainWindow()
{
InitializeComponent();
DataContext = this;
thing = new Thing();
int[,] prijsinflatie = new double[2000, 60];
}
public Thing thing { get; set; }
}

public class Thing
{
public ObservableCollection<string> stuff { get; set; }

public Thing()
{
stuff = new ObservableCollection<string>();

using (var reader = new StreamReader(@"D:\ActuComp\URM\Q2_Prijsinflatie.csv"))
{
List<string> listA = new List<string>();
while (!reader.EndOfStream)
{
var line = reader.ReadLine();
var values = line.Split(';');

for (int i = 0; i < 60; i++)
{
stuff.Add(values[i]);
}
}
}
}
}
}