C# merge one directory with another

Question

I have an autoupdater C# program. It will download a rar file that holds the changed or new files for the update to some software. The rar file has it\'s structure just like

Answer 1

DirectoryInfo Class

The following example demonstrates how to copy a directory and its contents.

public static void CopyAll(DirectoryInfo source, DirectoryInfo target)
{
    if (source.FullName.ToLower() == target.FullName.ToLower())
    {
        return;
    }

    // Check if the target directory exists, if not, create it.
    if (Directory.Exists(target.FullName) == false)
    {
        Directory.CreateDirectory(target.FullName);
    }

    // Copy each file into it's new directory.
    foreach (FileInfo fi in source.GetFiles())
    {
        Console.WriteLine(@"Copying {0}\{1}", target.FullName, fi.Name);
        fi.CopyTo(Path.Combine(target.ToString(), fi.Name), true);
    }

    // Copy each subdirectory using recursion.
    foreach (DirectoryInfo diSourceSubDir in source.GetDirectories())
    {
        DirectoryInfo nextTargetSubDir =
            target.CreateSubdirectory(diSourceSubDir.Name);
        CopyAll(diSourceSubDir, nextTargetSubDir);
    }
}

Answer 2

The simplest way is to use the FileSystem.MoveDirectory method. Make sure you add a reference to the Microsoft.VisualBasic.dll:

using Microsoft.VisualBasic.FileIO;
...
// Merge D:\SourceDir with D:\DestDir:
FileSystem.MoveDirectory("D:\\SourceDir", "D:\\DestDir", true /* Overwrite */);