merge file C#

To merge files in C#, you can read the contents of each file and write them into a new file. 

static void Main(string[] args)
    {
        // Specify the input files and the output file
        string[] inputFiles = { "file1.txt", "file2.txt", "file3.txt" }; // List of files to merge
        string outputFile = "mergedFile.txt"; // Output file

        try
        {
            using (StreamWriter writer = new StreamWriter(outputFile))
            {
                foreach (string file in inputFiles)
                {
                    if (File.Exists(file))
                    {
						string content = File.ReadAllText(file);
                        writer.WriteLine(content);
                    }
                    else
                    {
                        Console.WriteLine($"File not found: {file}");
                    }
                }
            }

            Console.WriteLine("Files merged successfully!");
        }
        catch (Exception ex)
        {
            Console.WriteLine($"An error occurred: {ex.Message}");
        }
    }

static void MergeFiles(string[] inputFiles, string outputFile)
{
    using Stream mergeStream = File.Create(outputFile);
    foreach (string filename in inputFiles)
    {
        byte[] fileData = File.ReadAllBytes(filename);
        mergeStream.Write(fileData);
    }
}