how to read file from this line to this in c# code example

Example: c# read file line by line

int counter = 0;  
string line;  
  
// Read the file and display it line by line.  
System.IO.StreamReader file =
    new System.IO.StreamReader(@"c:\test.txt");  
while((line = file.ReadLine()) != null)  
{  
    System.Console.WriteLine(line);  
    counter++;  
}  
  
file.Close();  
System.Console.WriteLine("There were {0} lines.", counter);  
// Suspend the screen.  
System.Console.ReadLine();