WebTest - VS2013 - Extract Regular Expression - Required=False

Question

I have an "Extract Regular Expression" that may or may not be able to extract a value. I set the property value of Required to False. The next block checks for the existence of that Context Parameter. If the Context Parameter is there, it does
some work, if the Context Parameter is not there, it skips the condition.
When I run my WebTest, it tells me that it passes the extraction rule but it never created the Context Parameter so the condition is skipped.
If I set Required=True, everything works as expected.
I remembered that there was a defect in VS2010 with the Required=False, so I added this Extraction Plug-In 
[DisplayName("Extract Regular Expression Not Required")]
[Description("Extract text matching a regex and add it to the test context. If no match is found, do not fail webtest. This gets around a VSTS bug where 'Required' property of the Extract Regular Expression rule is not honored.")]
public class ExtractRegularExpressionNotRequired : ExtractRegularExpression
public override void Extract(object sender, ExtractionEventArgs e)
base.Extract(sender, e);
e.Success = true;
That too passes the regular expression but fails to create the Context Parameter.

Answer 1

By setting the Required parameter to False, I am expecting that a Context Parameter does not get created if the regular expression is not found and that is does get created if the regular expression is found.
So when I run my test, it tells me that the regular expression was found but my Context Parameter was not created. 
When I created this webtest in VS2010, I found that there was a bug with the Extract Regular Expression when the Required property was False. This
thread showed the code for a custom Extraction rule to fix the problem. When I run this webtest in VS2013, both the built-in Extract Regular Expression and the custom Extract Regular Expression Not Required are not creating the Context Parameter if the
regex is found.
Try this yourself:
Create a webtest
Add "Extract Regular Expression"
Set the Regular expression to . (this will match any one character)
Set the Requiredto False
Set the Context Parameter Name to TEST
Run the webtest
Although the result from the extraction rule will be Passed, there is no Context Parameter TEST created. 
If you create the custom Extract Regular Expression Not Required plugin, the same problem occurs.