using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(?:[0-9]{12}|[0-9]{10}[A-Z])$";
string input = @"4024204455A
192345006900
4024204455A
192345006900
19234500690000000000
192345006900000A
This is a test 4024204455A this is a test
4024204455A this is a test
this is a test 4024204455A
This is a test4024204455A this is a test
4024204455Athis is a test
this is a test4024204455A
This is a test,4024204455A this is a test
:4024204455A: this is a test
this is a test##4024204455A";
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