using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"[Cat]";
string input = @"The regular expression above will every character that is either a captial ""C"", a lower case ""a"", or a lower case ""t"". The square brackets are used to indicate a list of characters to match (like saying ""I want to find any of the following items: 'C', 'a' or 't'""). To see all matches, click ""preg_match_all"" to the right (it's a long list).";
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