combine two csv files if the headers match in csharp

main.cs
using System;
using System.Linq;
using System.IO;

class Program {
    static void Main(string[] args) {
 
        var file1 = @"C:\path\to\file1.csv";
        var file2 = @"C:\path\to\file2.csv";
        var output = @"C:\path\to\output.csv";
        var separator = ',';
        var hasHeader = true;

        // Read files into arrays of strings
        var lines1 = File.ReadAllLines(file1);
        var lines2 = File.ReadAllLines(file2);

        // Split header and data for each file
        var header1 = lines1.First().Split(separator);
        var data1 = lines1.Skip(1);

        var header2 = lines2.First().Split(separator);
        var data2 = lines2.Skip(1);

        // Verify that headers match
        if (!header1.SequenceEqual(header2)) {
            Console.WriteLine("Headers do not match");
            return;
        }

        // Combine headers and data, and write to output file
        var result = new[] { header1 }.Concat(data1).Concat(data2);
        File.WriteAllLines(output, result.Select(row => string.Join(separator, row)));

        Console.WriteLine("Files combined successfully");
    }
}
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