using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"[a-z]{2}-[A-Z]{2}(?=:1)";
string input = @"\r\nab-CD:2\r\nab-EF:1\r\nbc-DE:3\r\ndz-LF:1\r\nkr-TZ:2\r\nef-DD:1\r\nlv-ER:2\r\ndf-QW:3\r";
foreach (Match m in Regex.Matches(input, pattern))
{
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