We always get requests to write a tip/tutorial on validating an email id using c#. Its actually quite simple and can be done by using the following code snippets.
isValidEmail takes a string
inputEmail and returns true if the string is a valid email id. Basically it uses an instance of
Regex class to check the string against the regular expression for a email id.
If you need more help then have a look at this article to see how it can be used elegantly.