using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?!.*\.{2})^(?![^@]{11})([a-z\d!#$%&'*+\-\/=?^_`{|}~\u00A0]+(\.[a-z\d!#$%&'*+\-\/=?^_`{|}~\u00A0]+)*|""((([ \t]*\r\n)?[ \t]+)?([\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e\u00A0]|\\[\x01-\x09\x0b\x0c\x0d-\x7f\u00A0]))*(([ \t]*\r\n)?[ \t]+)?"")@(([a-z\d\u00A0]|[a-z\d\u00A0][a-z\d\-._~\u00A0]*[a-z\d\u00A0])\.)+([a-z\u00A0]|[a-z\u00A0][a-z\d\-._~\u00A0]*[a-z\u00A0])\.?$";
string input = @"abc@google.com
abcdefghij@google.com
abcdefghijk@google.com";
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