public override Task ProcessHttpRequestAsync(HttpRequestMessage request, CancellationToken cancellationToken)
        {
            if (string.IsNullOrEmpty(_sasToken))
            {
                Action <string> action = (value) =>
                {
#if NETSTANDARD2_1_OR_GREATER || NET5_0_OR_GREATER
                    _sasToken = value.Replace(SASHeaderName + " ", "", StringComparison.Ordinal);
#else
                    _sasToken = value.Replace(SASHeaderName + " ", "");
#endif
                    SetAuthorizationHeader(request, _sasToken);
                };

#if NET5_0_OR_GREATER
                HttpRequestOptions requestOptions = request.Options;
                var requestOptionsKey             = new HttpRequestOptionsKey <Action <string> >(TpmDelegatingHandler.ProvisioningHeaderName);
                requestOptions.Set(requestOptionsKey, action);
#else
                request.Properties.Add(TpmDelegatingHandler.ProvisioningHeaderName, action);
#endif
            }
            else
            {
                SetAuthorizationHeader(request, _sasToken);
            }

            return(base.ProcessHttpRequestAsync(request, cancellationToken));
        }