C# read csv file row & columns values?

var reader = new StreamReader(File.OpenRead("input.txt"));
var data = new List<List<string>>();
        
while (!reader.EndOfStream)
{
    var line = reader.ReadLine();
    var values = line.Split(';');
            
    data.Add(new List<String> { values[0], values[1] });
}

Console.WriteLine(data[0][0]); //  -> userid1
Console.WriteLine(data[0][1]); //  -> password1