C# multi dimensional list

Question

this is my current working code below.

List<double> values = new List<double>();

foreach (string row in rows)
{
   Print(row);
                    
   //Checking if the row contains 4 numbers after the " ".
   //If true, then added to the collection
   if (Regex.IsMatch(row, @" (\d{4})"))
      values.Add(double.Parse(Regex.Match(row, @" (\d{4})").Groups[1].Value));
}

foreach (double i in values) 
{
   Print("row value " + i);
}   

What I would also like to do is also parse the 4 numbers before the " " and when looping through each row as above however have 2 variables.

I have attempted to solve this problem by searching on the web and the closest outcome I got was as follows but I don't know how to loop through?

List<string[]> grid = new List<string[]>();

//Populate the list
foreach (var line in lines) grid.Add(line.Split(' '));

//Print(grid);
                
//You can still access it like your 2D array:
Print(grid[0][0] + " " + grid[0][1]); 

Thanks in advance for your help/suggestions.

Answer 1

Something like this?

foreach(var array in grid)
{
  Print(array[0] + " " + array[1]); 
}

I've node added any safety checks, you need to check that there are enough elements you want, otherwise you'd get an index out of range exception