System.Net.Mail.Tests.MessageHeaderBehaviorTest.Message_WithXReceiverSetByUser_ShouldNotClearXReceiverHeader C# (CSharp) Method

        public void Message_WithXReceiverSetByUser_ShouldNotClearXReceiverHeader()
        {
            _message.Headers.Add("X-Receiver", "[email protected]");
            _message.From = new MailAddress("[email protected]");
            _message.To.Add(new MailAddress("[email protected]"));
            _message.HeadersEncoding = Encoding.UTF8;

            _message.PrepareEnvelopeHeaders(true, false);
            Assert.NotNull(_message.EnvelopeHeaders.GetValues("X-Receiver"));
            _message.EncodeHeaders(_message.EnvelopeHeaders, false);
            _message.EncodeHeaders(_message.Headers, false);

            Assert.Equal(1, _message.EnvelopeHeaders.GetValues("X-Receiver").Length);
            Assert.Equal(1, _message.Headers.GetValues("X-Receiver").Length);
        }