try
{
    // Retrieve the file from Azure Blob Storage
    BlobServiceClient bsclient = new BlobServiceClient(new Uri($"https://{SourceSA}.blob.core.chinacloudapi.cn"),new ManagedIdentityCredential(ClientID));
    BlobContainerClient containerClient = bsclient.GetBlobContainerClient(ContainerName);
    BlobClient sourceBlobClient = containerClient.GetBlobClient($"{sourcepathWithoutContainer}");
    MemoryStream SourceFileStream = new MemoryStream();
    await sourceBlobClient.DownloadToAsync(SourceFileStream);
    SourceFileStream.Position = 0;
    
    // ... Process Logic Process ...
}
catch (Exception ex)
{
    log.LogError(ex, "An error occurred while encrypting the file.");
    return new ObjectResult($"Error: {ex.Message}");
}