Add convenience headers and namespaces for examples.
diff --git a/asio/include/net.hpp b/asio/include/net.hpp
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+++ b/asio/include/net.hpp
@@ -0,0 +1,22 @@
+//
+// net.hpp
+// ~~~~~~~
+//
+// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef NET_HPP
+#define NET_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/ts/net.hpp"
+
+namespace net = asio;
+
+#endif // NET_HPP
diff --git a/asio/include/netx.hpp b/asio/include/netx.hpp
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+++ b/asio/include/netx.hpp
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+//
+// netx.hpp
+// ~~~~~~~~
+//
+// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef NETX_HPP
+#define NETX_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/awaitable.hpp"
+#include "asio/co_spawn.hpp"
+#include "asio/detached.hpp"
+#include "asio/experimental/as_single.hpp"
+#include "asio/generic/datagram_protocol.hpp"
+#include "asio/generic/stream_protocol.hpp"
+#include "asio/generic/host.hpp"
+#include "asio/ip/tls_tcp.hpp"
+#include "asio/use_awaitable.hpp"
+
+namespace netx
+{
+ using asio::awaitable;
+ using asio::co_spawn;
+ using asio::detached;
+ using asio::experimental::as_single_t;
+ using asio::generic::host;
+ using asio::use_awaitable_t;
+ using generic_datagram_socket = asio::generic::datagram_protocol::socket;
+ using generic_stream_socket = asio::generic::stream_protocol::socket;
+ namespace ip { using asio::ip::tls_tcp; }
+}
+
+#endif // NETX_HPP
