insert a file in azure container

If you are just looking for .net core code to upload blobs and list containers, just try this .net core console app below:

using Azure.Storage.Blobs;
using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;


namespace blobUpload
{
    class Program
    {
        static void Main(string[] args)
        {
            string localFilePath = "<path of file to upload>";
            string containerName = "<container name>";
            string storageConnStr = "<storage account connection string>";


            BlobServiceClient blobServiceClient = new BlobServiceClient(storageConnStr);
            Console.WriteLine("====listContainers====");
            listContainers(blobServiceClient);

            Console.WriteLine("====listContainerBlobs====");
            listContainerBlobs(blobServiceClient, containerName);

            Console.WriteLine("====upload files to a Container====");
            uploadFiles(blobServiceClient, localFilePath, containerName);


        }

        public static void uploadFiles(BlobServiceClient blobServiceClient,String filePath,string containerName) {
            var container = blobServiceClient.GetBlobContainerClient(containerName);
            var blobClient = container.GetBlobClient("testFile.zip");
            Console.WriteLine(blobClient.UploadAsync(filePath).GetAwaiter().GetResult());
        }

        public static void listContainers(BlobServiceClient blobServiceClient) {
            var containerEmulator = blobServiceClient.GetBlobContainers().GetEnumerator();
            
            while (containerEmulator.MoveNext()) {
                Console.WriteLine(containerEmulator.Current.Name);
            }
        }

        public static void listContainerBlobs(BlobServiceClient blobServiceClient,string containerName)
        {
            var container = blobServiceClient.GetBlobContainerClient(containerName);
            var blobEmulator = container.GetBlobs().GetEnumerator();
            while (blobEmulator.MoveNext())
            {
                Console.WriteLine(blobEmulator.Current.Name);
            }

        }

    }

}

Result : the uploaded file: