Question

I have a .txt file like this:
6 4
1 2
2 3
3 4
4 5
1 2 4 5

How can I use this as command line argument in C#?

Answer 1

If you intend to give your program data program.exe < data.txt, this is called reading from standard input. You can do this via .NET’s Console.OpenStandardInput with

new StreamReader(Console.OpenStandardInput())

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Alternatively, if you’d rather your program be run program.exe data.txt, start with

void Main(string[] args)
{
    File.ReadLines(args[0])
}