The cat command is one of the most frequently used commands on Linux/Unix like operating systems. Needless to say it could also be very useful on your Windows system.

Here is the C# code to create your own cat command...

Program.cs:

using System;

namespace cat {
    class Program {
        static void Main(string[] args) {
            if (null != args && args.Length > 0) {
                foreach (string arg in args) {
                    if (System.IO.File.Exists(arg)) {
                        Console.Write(System.IO.File.ReadAllText(arg));
                        Console.Write(Environment.NewLine);
                    }
                }
            }
        }
    }
}

The usage should be mostly the same as with it’s Unix counterpart.

To learn more see The cat Command.