upload-to-azure.cs

// Retrieve storage account from connection string.
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
    CloudConfigurationManager.GetSetting("StorageConnectionString"));

// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference("mycontainer");

// Retrieve reference to a blob named "myblob".
CloudBlockBlob blockBlob = container.GetBlockBlobReference("newfile.jpg");

var ms = new MemoryStream();

ImageBuilder.Current.Build("~/originalFile.jpg", ms, new ResizeSettings("width=3200&height=3200&format=jpg"));

ms.Seek(0,SeekOrigin.Begin);

blockBlob.UploadFromStream(ms);