Creates a new instance of HttpMessageHandler with default SyncPolicy, that callers can use with an HttpClient object of enabling caching and Synchronization capabilities. The Sync handler is non-delegating and the last in the chain. It will automatically use the Diagnostics and Authorization handlers so callers shouldn't add those to the chain.

Creates a new instance of HttpMessageHandler that callers can use with an HttpClient object of enabling caching and Synchronization capabilities. The Sync handler is non-delegating and the last in the chain. It will automatically use the Diagnostics and Authorization handlers so callers shouldn't add those to the chain.