using System;
using System.IO;

namespace kadai
{
    class Program
    {
        static void Main(string[] args)
        {
            string path = @"E:\Sample";

            Directory.CreateDirectory(path);

            Console.WriteLine("フォルダを作成しました");
            Console.ReadKey();
        }
    }
}

フォルダーを作成しました

だいすけ @daikon9001

こんにちは

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フォルダを作成 C#

フォルダを作成　C#