I think this would give you the equivalent of what you are looking for in your resultRow array
string[][] table = new string[][] {
new string[] { "ID", "Name", "Age" },
new string[] { "1", "Jim", "25" },
new string[] { "2", "Bob", "30" },
new string[] { "3", "Joe", "35" }
};
//get index of column to look at
string columnName = "Name";
var columnIndex = Array.IndexOf(table[0], columnName, 0);
// skip the title row, and then skip columns until you get to the proper index and get its value
var results = table.Skip(1).Select(row => row.Skip(columnIndex).FirstOrDefault());
foreach (var result in results)
{
Console.WriteLine(result);
}
One other thing to look at would be SelectMany, as you can use it to flatten mlutiple lists into a single list.