Regular expression validator is one of the more powerful features
ASP.NET. Everyone liked the regular expressions. Especially when you write them
evil-and the really big then a few days later, look at that and say to yourself:
What does this do?

Again, simple usage is:

ControlToValidate = "textbox1"
ValidationExpression =".*@.* \ \ ..* "
ErrorMessage = "* Your entry is not an e-mail address is valid."
display = "dynamic"> *

Here are the services I want to use to check
My regular expressions for validity.