Properties with [YamlIgnore] being accessed during serialization

[roji]

[YamlIgnore] doesn't exactly work - properties having it are still invoked, and their results are discarded only afterwards.

For example, if a property with [YamlIgnore] throws an exception, this will make the serialization process abort.

To repro, go to the ContainsIgnore class in SerializationTests.cs and throw exceptions from the getter/setter. I've created a commit that demonstrates this for the original YamlDotNet here: roji/YamlDotNet@648463e

[xoofx]

Sorry, I can't reproduce this in latest SharpYaml I have uploaded the changes in the test in commit f545fd2.