using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        var canParseSuccess = long.TryParse("0003000006D261BA", System.Globalization.NumberStyles.HexNumber, null, out long success);

        var canParseFailure = long.TryParse("0003400181409581", System.Globalization.NumberStyles.HexNumber, null, out long failure);

        Console.WriteLine($"{success}, {canParseSuccess}");

        Console.WriteLine($"{failure}, {canParseFailure}");

        Console.WriteLine();

        canParseSuccess = long.TryParse("0003000006D261BA", NumberStyles.HexNumber, CultureInfo.InvariantCulture, out success);

        canParseFailure = long.TryParse("0003400181409581", NumberStyles.HexNumber, CultureInfo.InvariantCulture, out failure);

        Console.WriteLine($"{success}, {canParseSuccess}");

        Console.WriteLine($"{failure}, {canParseFailure}");

    }

}