public async Task TestDownload()
{
CloudBlockBlob blob = await CreateEmptyBlob("blob");
AzureBlob azureBlob = new AzureBlob(blob);
string path = Path.Combine(Path.GetTempPath(), "azureblobtest");
File.Delete(path);
await azureBlob.Download(path);
Assert.IsTrue(File.Exists(path));
}