System.Net.Mail.Tests.SmtpClientTest.ServicePoint_GetsCachedInstanceSpecificToHostPort C# (CSharp) Method

        public void ServicePoint_GetsCachedInstanceSpecificToHostPort()
        {
            using (var smtp1 = new SmtpClient("localhost1", 25))
            using (var smtp2 = new SmtpClient("localhost1", 25))
            using (var smtp3 = new SmtpClient("localhost2", 25))
            using (var smtp4 = new SmtpClient("localhost2", 26))
            {
                ServicePoint s1 = smtp1.ServicePoint;
                ServicePoint s2 = smtp2.ServicePoint;
                ServicePoint s3 = smtp3.ServicePoint;
                ServicePoint s4 = smtp4.ServicePoint;

                Assert.NotNull(s1);
                Assert.NotNull(s2);
                Assert.NotNull(s3);
                Assert.NotNull(s4);

                Assert.Same(s1, s2);
                Assert.NotSame(s2, s3);
                Assert.NotSame(s2, s4);
                Assert.NotSame(s3, s4);
            }
        }