read and write to perticular line and column no...

You need to learn some basics of reading and writing in textfile before accomplish this task
How to: Read From a Text File (C# Programming Guide)[^]
How to: Write to a Text File (C# Programming Guide)[^]
whatever you can use

Dim lines As String() = IO.File.ReadAllLines("file path here") 

for more reference you can take a look at some given link
Read a certain line in a text file[^]
read a specific line from a txt file in VB .net[^]

Here are some pretty useful Links available that I personally used for similar purpose


http://www.daniweb.com/software-development/csharp/threads/344867/read-rowscolumns-of-numbers-in-a-text-file[^]

http://www.c-sharpcorner.com/Forums/Thread/85767/[^]

http://stackoverflow.com/questions/2805495/reading-a-text-file-and-pulling-out-specific-columns[^]