DRAG DROP
You are developing a class named ExtensionMethods.
You need to ensure that the ExtensionMethods class implements the IsEmail() method on string
objects.
How should you complete the relevant code? (To answer, drag the appropriate code segments to
the correct locations in the answer are
a. Each code segment may be used once, more than once, or not at all. You may need to drag the
split bar between panes or scroll to view content.)
Answer: 
Explanation:
Why is it: public static bool isUrl(this String str) ?
should it not be: public static bool isUrl(String str) ?
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@see http://www.amazon.de/C-6-0-Nutshell-Definitive-Reference/dp/1491927062
chapter 4, page 171 f -> page 172 !!!
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Thanks Christin
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http://msdn.microsoft.com/en-us/library/vstudio/bb311042.aspx
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