what does string txt do programing c# code example

Example 1: how to read a text file C#

string[] text = System.IO.File.ReadAllLines(@"C:\users\username\filepath\file.txt");

Example 2: how to call last string from text file C#

If the file is not too large, just read the lines and pick the last:

string lastLine = File.ReadLines("pathToFile").LastOrDefault();