System.Net.NetworkInformation.Tests.PingTest.SendAsyncs_ReuseInstance_Hostname C# (CSharp) Метод

        public static async Task SendAsyncs_ReuseInstance_Hostname()
        {
            IPAddress localIpAddress = await TestSettings.GetLocalIPAddress();

            using (Ping p = new Ping())
            {
                TaskCompletionSource<bool> tcs = null;
                PingCompletedEventArgs ea = null;
                p.PingCompleted += (s, e) =>
                {
                    ea = e;
                    tcs.TrySetResult(true);
                };
                Action reset = () =>
                {
                    ea = null;
                    tcs = new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);
                };

                // Several normal iterations
                for (int i = 0; i < 3; i++)
                {
                    reset();
                    p.SendAsync(TestSettings.LocalHost, null);
                    await tcs.Task;

                    Assert.NotNull(ea);
                    Assert.Equal(IPStatus.Success, ea.Reply.Status);
                    Assert.True(ea.Reply.Address.Equals(localIpAddress));
                }

                // Several canceled iterations
                for (int i = 0; i < 3; i++)
                {
                    reset();
                    p.SendAsync(TestSettings.LocalHost, null);
                    p.SendAsyncCancel(); // will block until operation can be started again
                }
                await tcs.Task;
                Assert.True(ea.Cancelled ^ (ea.Error != null) ^ (ea.Reply != null));
            }
        }