Create folder

Question

Hi,

I want to create new folder, but it can be exist.

How I handel this case of renaming?

Thanks,

Answer 1

Hi @Dani_S , Welcome to Microsoft Q&A,

To create a new folder in C# while handling the case where the folder might already exist and you want to rename it, you can use the following method. If it does exist, append a number to the folder name until a unique name is found.

using System;
using System.IO;

public class Program
{
    public static void Main()
    {
        string folderPath = @"C:\Example\NewFolder";
        string newFolderPath = CreateUniqueFolder(folderPath);

        Console.WriteLine($"Created folder: {newFolderPath}");
    }

    public static string CreateUniqueFolder(string folderPath)
    {
        string uniqueFolderPath = folderPath;
        int counter = 1;

        while (Directory.Exists(uniqueFolderPath))
        {
            uniqueFolderPath = $"{folderPath}_{counter}";
            counter++;
        }

        Directory.CreateDirectory(uniqueFolderPath);
        return uniqueFolderPath;
    }
}

Best Regards,

Jiale

---

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.