Need help with C# code to remove the specific code from a txt file

i need to load a file into the database but i have header in between the rows as this a file generated from a weird system

EX: 

col1 col2 col2 col4

col5 col6

1     2      3     4      

5     6

1     2      3     4      

5     6

1     2      3     4      

5     6

Date 1/3/2013

col1 col2 col2 col4 col5 col6                             

1     2      3     4       5     6

Soo i have header in between the rows soo i have to remove the date and header, i dont have any idea about the c# script