Upload a nested file to azure blob storage

NestedFile2.cs

// ...setup container

var folder = container.GetDirectoryReference("directory");
var sub = folder.GetBlockBlobReference("nested_file");
using (var stream = new MemoryStream(File.ReadAllBytes("path_del_file")))
{
    stream.Seek(0, SeekOrigin.Begin);
    sub.UploadFromStream(stream);
    stream.Close();
}