using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^-?\d{1,3}(?:(?:,\d{3}){0,4}(?:\.\d{1,2})|(?:(?:\s\d{3}){0,4}|(?:\d{0,12}))(?:[.,]\d{1,2})?)$";
string input = @"123456
123456.12
123456,00
123,456.12
123,456,12
123 456.12
123,456,12
123,456,123,123,123.00
123,456.123
123 456,789.12";
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