using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^-?(\d+|\d{1,3}(?:\,\d{3})+)?(\.\d+)?$";
string input = @"1234567890
12345678.901
123,456,789.01
123,45678.901
123,456,789..01
123,456,789.
.0123456789
-1234567890
-12345678.901
-123,456,789.01
-123,45678.901
123,456,789..01
-123,456,789.
-.0123456789";
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