How to read a txt file into a two-dimensional array

Question

Hello everyone,
I have a txt file with the following data:

 

line1
line2
line3
 
col1 col2 col3 col4
1    3    12   63
83   10   19   14
21   34   87   54 

I'd like to read that file, remove the header, remove col1 ......col4.
So, at the end I'd like to have the following data in a two-dimensional array so that I can manipulate (copy, sort...) them:

 
1    3    12   63
83   10   19   14
21   34   87   54 

I've found on this and other forums how to read the txt, but no solutions how to remove all these unwanted lines.
I'm reading the file so:

 
string[] lines = System.IO.File.ReadAllLines(@"E:\Task\myfile.txt");

Thanks for your help
Kabanga