title: How to extract and manipulate data from text file in VB 2010 using string manipulation methods
body: <p>I need help on extracting data from a specific text file (C:\test.txt). Text file contains student names and scores:</p>
  
  <p>Alice,76,45,87,23
  Ben,76,48,85,65
  Julie,76,36,49,86
  Monica,85,90,83,76</p>
  
  <p>Given the grade structure which is: A (70-100), B(60-69),C(50-59),D(40-49),F(0-39)</p>
  
  <p>Application should calculate the average score and grade received by each student
  Display who received the highest mark
  Display the average mark of all students in the class
  List students who received grade "C"</p>
  
  <p>The required methods to be used are Len, Mid and Instr 
  File to be processed line by line</p>
  
  <p>Many thanks for the help!</p>