Arriving at Kathmandu

using System;
using System.Linq;
using System.Collections.Generic;
using System.Text.RegularExpressions;

namespace Arriving_at_Katmandu
{
    class Program
    {
        static void Main()
        {
			//solved with a little regex and many if-s
            while (true)
            {
                string enterInfo = Console.ReadLine();

                if (enterInfo == "Last note")
                {
                    break;
                }

                else
                {
                    bool isCorrect = true;

                    //enter the data for the peaks, split to get the mountain

                    string[] data = enterInfo.Split("=").ToArray();

                    //should be of two parts - mountain and the rest of the data
                    if (data.Length == 2)
                    {
                        //get the mountain name to check if it is correct
                        string namePeak = data[0];

                        //get pattern
                        Regex RgxUrl = new Regex("^[a-zA-Z0-9!@#$?]+$");

                        //check if the string matches the pattern, returns true/false
                        bool isPeak = RgxUrl.IsMatch(namePeak);

                        if (isPeak == true)
                        {
                            //we have it
                            string mountain = GetName(namePeak);

                            //split to get the length and the name of the hashcode
                            string[] lengthNameHash = data[1].Split("<<").ToArray();

                            //should be of length 2
                            if (lengthNameHash.Length == 2)
                            {
                                //the first element must be an integer
                                int length;

                                //check if it is integer
                                bool isNum = int.TryParse(lengthNameHash[0], out length);


                                if (isNum)
                                {
                                    //get the hashcode name
                                    string geohash = lengthNameHash[1];

                                    //check if the name is with the stated length
                                    if (geohash.Length == length)
                                        Console.WriteLine($"Coordinates found! {mountain} -> {geohash}");
                                    else
                                        isCorrect = false;
                                }
                                else
                                    isCorrect = false;
                            }
                        }
                        else
                            isCorrect = false;

                    }
                    else
                        isCorrect = false;

                    if (isCorrect == false)
                    {
                        Console.WriteLine("Nothing found!");
                    }
                }
            }
        }

        static string GetName(string name)
        {
            string newName = "";

            for (int i = 0; i < name.Length; i++)
            {
                if (name[i] >= 'A' && name[i] <= 'Z'
                    || name[i] >= 'a' && name[i] <= 'z'
                    || name[i] >= '0' && name[i] <= '9')
                {
                    newName += name[i];
                }
            }

            return newName;
        }
    }
}