How best to read a File into List

Question

I am using a list to limit the file size since the target is limited in disk and ram. This is what I am doing now but is there a more efficient way?

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Answer 1

Don't store it if possible. Just read through it if you are memory constrained. You can use a StreamReader:

using (var reader = new StreamReader("file.txt"))
{
    var line = reader.ReadLine();
    // process line here
}

This can be wrapped in a method which yields strings per line read if you want to use LINQ.