C# .NET: How to Validate an Email Address With Regular Expressions in .NET

The following uses regular expressions to determine if a given string is a valid email address.

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using System.Text.RegularExpressions;

....

public static bool IsValidEmail(string email)
{
	if (string.IsNullOrEmpty(email))
	{
		return false;
	}

	Regex regex = new Regex(@"\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*", RegexOptions.Compiled);
	Match match = regex.Match(email);
	return ((match.Success && (match.Index == 0)) && (match.Length == email.Length));
}