static void AssignDownloadPolicyContainerPermissions(CloudBlobContainer container)
{
// Secure storage. We will provide read tokens for access to blob data on a per-blob basis.
var containerPermissions = new BlobContainerPermissions();
containerPermissions.PublicAccess = BlobContainerPublicAccessType.Off;
containerPermissions.SharedAccessPolicies.Add(DownloadPolicyName, new SharedAccessBlobPolicy
{
Permissions = SharedAccessBlobPermissions.Read
});
container.SetPermissions(containerPermissions);
}