text file into multiple text boxes

Hello

I am pretty new to C#. I have a text file separted by comma, which I want  to read one by one into multiple text boxes.

For eg : text file looks like this

A,a,20,abc

B,b,30,xyz

C,c,40, lmo

I want to read 20, 30 , 40 into textbox1 , 2 and 3 respectively. 

Since my textfile is as big as 100 lines and 100 text boxes, I am trying to use some function which could optimize the code.

I have used this function now to read the value but I dont know how to do for 100 lines.

File.ReadLines(" .txt").Skip(1).Take(1).First().Split(',')[2]

Would really appreciate any help:)

Thanks!