Question

I´m coding in C# and using Windows Forms.
I have a textfile and want to count all rows that are in it.

Peter;25

John;31

Jane;22

Thats three lines and i want to count them for example.

Answer 1

The best way would be to use something like:

var count = File.ReadLines("file.txt").Count();

That will only work in .NET 4, but will read a single line at a time. If you’re happy enough to load the whole file into memory in one go, you can use:

var count = File.ReadAllLines("file.txt").Length;

Note that if the file is large (or it’s on a network drive etc), this could take a long time, in which case you’d want to do it off the UI thread.