将文件写入blob容器时，在根容器中创建空文件

using Azure.Storage.Blobs;
using System;

public class BlobExample
{
    public static async Task CreateEmptyBlobAsync(string connectionString, string containerName, string blobName)
    {
        // 创建Blob客户端
        BlobServiceClient blobServiceClient = new BlobServiceClient(connectionString);
        BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient(containerName);

        // 确保容器存在
        if (!await containerClient.ExistsAsync())
        {
            await containerClient.CreateIfNotExistsAsync();
        }

        // 创建空Blob
        BlobClient blobClient = containerClient.GetBlobClient(blobName);
        using (var stream = new MemoryStream())
        {
            await blobClient.UploadAsync(stream, overwrite: true);
        }

        Console.WriteLine($"空文件 '{blobName}' 已创建在容器 '{containerName}' 中。");
    }
}