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C# Read Text File Line By Line

Reading a text file is quite easy, you can read the whole lot into a string or read one line at a time. This is for reading one line at a time. 

Start out with System IO at the top

using System.IO;

Then set a the file name, check the file exists, set up a streamreader then read!

string MyFile = "C:\MyFolder\MyFile.txt"
StreamReader MyStreamReader = new StreamReader(MyFile);
string Line1 = MyStreamReader.ReadLine();
string Line2 = MyStreamReader.ReadLine();
string Line3 = MyStreamReader.ReadLine();
...

This is great for simple text files where you know the format and what to expect. It's a bit long winded if there's a lot of lines. You can loop through all the lines though until you run out of lines. Take note of the many brackets in the while setup.

string MyFile = "C:\MyFolder\MyFile.txt"
StreamReader MyStreamReader = new StreamReader(MyFile);
string MyLine = "";

while((MyLine = MyStreamReader.ReadLine()) != null){
   //MyLine is this line of text for you to process however you need
   MyTextBox.Text = MyLine + " XX ";
}

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