using System;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
var versionPattern = @"^\d+(.\d+){3}$";
if (Regex.IsMatch("1.0.0.123", versionPattern))
{
Console.WriteLine("match");
}
if (Regex.IsMatch("1.0.0.4", versionPattern))
{
Console.WriteLine("match");
}
}
}
dXNpbmcgU3lzdGVtOwp1c2luZyBTeXN0ZW0uVGV4dC5SZWd1bGFyRXhwcmVzc2lvbnM7CgpwdWJsaWMgY2xhc3MgVGVzdAp7CglwdWJsaWMgc3RhdGljIHZvaWQgTWFpbigpCgl7CgkJdmFyIHZlcnNpb25QYXR0ZXJuID0gQCJeXGQrKC5cZCspezN9JCI7CgkJaWYgKFJlZ2V4LklzTWF0Y2goIjEuMC4wLjEyMyIsIHZlcnNpb25QYXR0ZXJuKSkKCQl7CgkJCUNvbnNvbGUuV3JpdGVMaW5lKCJtYXRjaCIpOwoJCQoJCX0KCQlpZiAoUmVnZXguSXNNYXRjaCgiMS4wLjAuNCIsIHZlcnNpb25QYXR0ZXJuKSkKCQl7CgkJCUNvbnNvbGUuV3JpdGVMaW5lKCJtYXRjaCIpOwoJCQoJCX0KCX0KfQ==