using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^((([a-z0-9]+[\-]{0,1})+[a-z0-9]+?\.)+[a-z0-9][a-z0-9|\-]+[a-z0-9])@([a-z0-9]+[\-|\.]{0,1}[a-z0-9]+)+(.[a-z0-9]{2,})+$";
string input = @"m-0-o.bfe-nfk@s-ugd-og.gg-gm-ain.com.pl
wfff-ef-ff.mi-ki.fi-ki.miki@dns1-su-ddd.o-ma.in.dom-ain.kkk
max-io.be-nko@sub-dom-ain.dom-ain.com.pl
#ver. 6
^((([a-z0-9]+[\-]{0,1})+[a-z0-9]+?\.)+[a-z0-9][a-z0-9|\-]+[a-z0-9])@([a-z0-9]+[\-|\.]{0,1}[a-z0-9])+(.[a-z0-9]{2,})+$
#ver. 5
^([a-z0-9][a-z0-9|\-]+[a-z0-9]{1,}?\.)+[a-z0-9|\-]+[a-z0-9]@([a-z0-9][a-z0-9|\-]+?\.[a-z0-9|\-]+[a-z0-9](.[a-z0-9]{2,})+)$
#ver. 4
^[\w][a-z0-9|\-]+?\.[a-z0-9|\-]+[\w]@([\w][a-z0-9|\-]+?\.[a-z0-9|\-]+[\w](.[a-z0-9]{2,})+)$
# ver. 3
^[a-z0-9\-\.]+@([\w][a-z0-9|\-]+?\.[a-z0-9|\-]+[\w](.[a-z0-9]{2,})+)$
#ver. 2
^[a-z0-9\-\.]+@[a-z0-9|\-]+?\.[a-z0-9|\-]+(.[a-z0-9]{2,})+$
#ver. 1
^([\w\.\-]+)@([\w\-]+)((\.(\w){2,3})+)$";
RegexOptions options = RegexOptions.Multiline;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx