using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @/
^#([A-F0-9]{3}){1,2}$
/;
string input = @"Only matches when there are 3 & 6 digits
#
#1
#12
#123
#1234
#12345
#123456
#1234567
Only matches if the letters used are: A, B, C, D, E & F
#ABCDEF
#BCDEFG
#0A1B2C
#0E1F2Z
Must use the 'i' flag to match lower & upper case.
#AaBbCc
Arbitrary examples
#15F
#C88
#9264FA
#fF0eE1
#FFFXFF
#FFFYFF
#ABCDEF
#ABC*EF
#778657
#E9B3C4";
RegexOptions options = RegexOptions.IgnoreCase | 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