Anyway to determine if an Azure BlockBlob with uncommitted blocks exists?

I am unable to determine if a BlockBlob does not exist at all or contains uncommitted blocks.

Please examine the following code:

private CloudBlobContainer _blobContainer;

private async Task BlobExistTest()
{
    // Get a reference to a brand new (non-existing) blob:
    CloudBlockBlob blob = _blobContainer.GetBlockBlobReference("Test.txt");

    // Query Azure about blob
    bool blobExists = await blob.ExistsAsync();
    try{ var blobBlockCount =  (await blob.DownloadBlockListAsync(BlockListingFilter.All, null, null, null)).Count();        }catch(Exception e){;}
    // Results: Says blob doesn't exist at all on Azure (expected)
    //   - blobExists: false
    //   - Exception on blob.DownloadBlockListAsync(): The remote server 

    // Add a block:
    MemoryStream blockData = new MemoryStream(Encoding.UTF8.GetBytes("Sample data for block"));
    string blockId = Convert.ToBase64String(BitConverter.GetBytes(0));
    await blob.PutBlockAsync(blockId, blockData, null);

    // Query Azure - Now what does Azure say?
    blobExists = await blob.ExistsAsync();
    blobBlockCount =  (await blob.DownloadBlockListAsync(BlockListingFilter.All, null, null, null)).Count();

    // Results:
    //   - blobExists : false
    //   - blobBlockCount : 1
}

CloudBlockBlob.Exists() returns false even if there is data stored as uncommitted blocks.

To determine that a "non-existing" Blob actually exists and has uncommitted blocks, DownloadBlockList() can be used.

I do not like this solution as it is inefficient and relies on an exception.

I think that the issue is that a Blob made of uncommitted blocks is in a kind of zombie state both existing and not existing in respect of the Azure Storage API!

Ideally I would like to know if a blob:

• Does not exist at all
• Has uncommitted blocks
• Exists & blocks are committed

Any idea how to achieve that?