BlobStorage.Advanced.CopyBlockBlobAsync C# (CSharp) Method

        private static async Task CopyBlockBlobAsync(CloudBlobContainer container)
        {
            CloudBlockBlob sourceBlob = null;
            CloudBlockBlob destBlob = null;
            string leaseId = null;

            try
            {
                // Get a block blob from the container to use as the source.
                sourceBlob = container.ListBlobs().OfType<CloudBlockBlob>().FirstOrDefault();

                // Lease the source blob for the copy operation to prevent another client from modifying it.
                // Specifying null for the lease interval creates an infinite lease.
                leaseId = await sourceBlob.AcquireLeaseAsync(null);

                // Get a reference to a destination blob (in this case, a new blob).
                destBlob = container.GetBlockBlobReference("copy of " + sourceBlob.Name);

                // Ensure that the source blob exists.
                if (await sourceBlob.ExistsAsync())
                {
                    // Get the ID of the copy operation.
                    string copyId = await destBlob.StartCopyAsync(sourceBlob);

                    // Fetch the destination blob's properties before checking the copy state.
                    await destBlob.FetchAttributesAsync();

                    Console.WriteLine("Status of copy operation: {0}", destBlob.CopyState.Status);
                    Console.WriteLine("Completion time: {0}", destBlob.CopyState.CompletionTime);
                    Console.WriteLine("Bytes copied: {0}", destBlob.CopyState.BytesCopied.ToString());
                    Console.WriteLine("Total bytes: {0}", destBlob.CopyState.TotalBytes.ToString());
                    Console.WriteLine();
                }
            }
            catch (StorageException e)
            {
                Console.WriteLine(e.Message);
                Console.ReadLine();
                throw;
            }
            finally
            {
                // Break the lease on the source blob.
                if (sourceBlob != null)
                {
                    await sourceBlob.FetchAttributesAsync();

                    if (sourceBlob.Properties.LeaseState != LeaseState.Available)
                    {
                        await sourceBlob.BreakLeaseAsync(new TimeSpan(0));
                    }
                }
            }
        }