C#程序Write2函数出现数组越界错误，寻求调试帮助

我正在完成一项编程练习，需求是输入一段文本后，找出其中最长的非数字序列（规则：遇到数字即分割序列，仅需统计序列长度）。我的C#程序中，Write2函数负责实现该功能，但第43行出现了**数组越界（Out of bounds of Array）**错误。尝试多种方法仍未解决，恳请帮助！

测试输入：Xyz7jkl9ylk2XZjwasd

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace VeryHigh2
{
    //Xyz7jkl9ylk2XZjwasd
    internal class Program
    {
        static void Main(string[] args)
        {
            string word = Console.ReadLine();
            int n = word.Length / 4;

            Console.WriteLine("             IZLAZI               \n-------------ODGOVOR 1-------------\n");
            Write1(word);
            Console.WriteLine("\n-------------ODGOVOR 1-------------\n");
            Write2(word,n);
        }
        static void Write2(string word,int n)
        {
            int[] Sequence = new int[n];
            string s = "";
            int i = 0;
            int counter = 1;
            while(i < Sequence.Length)
            {
                for (int t = 0; t < word.Length; t++)
                {
                    char c = word[t];
                    if (c == '0' || c == '1' || c == '2' || c == '3' || c == '4' || c == '5' || c == '6' || c == '7' || c == '8' || c == '9')
                    {
                        counter++;
                        if (s == "")
                        { 
                            continue;
                        }
                        else
                        {
                            int a = s.Length;
                            Sequence[i] = a;
                            s = "";
                            i++;
                        }
                        continue;
                    }
                    else
                    {
                        s = s + Convert.ToString(c);
                        counter++;
                    }
                }
                if (counter == word.Length)
                {
                    Sequence[i] = s.Length;
                    int b = Sequence.Length;
                    i = b;
                }
            }
            int max = Sequence[0];
            for(int j = 1; j < Sequence.Length; j++)
            {
                if(max < Sequence[j])
                {
                    max = Sequence[j];
                }
            }
            Console.WriteLine(max);
        }
        static void Write1(string word)
        {
            int counter1 = 0;
            int counter2 = 0;
            string lower = word.ToLower();
            string upper = word.ToUpper();
            char l = lower[0];
            char u = upper[0];
            
            for(int i = 0; i < word.Length; i++)
            {
                if(l == word[i] || u == word[i])
                {
                    counter1++;
                }
            }
            for(int i = 1; i < word.Length; i++)
            {
                l = lower[i];
                u = upper[i];
                for(int a = 0; a < word.Length; a++)
                {
                    if (word[a] == l || word[a] == u)
                    {
                        counter2++;
                    }
                }
                if(counter2 == counter1)
                {
                    goto counter;
                }
                else
                {
                    Console.WriteLine("Tekst nije uravnotezen!");
                    break;
                }
                counter:
                counter2 = 0;
                if(i == word.Length - 1)
                {
                    Console.WriteLine("Tekst je uravnotezen!");
                }
            }
        }
    }
}

已尝试的解决方法：

• 调整while循环的逻辑
• 直接赋值要插入数组的变量

内容的提问来源于stack exchange，提问作者Nikola Ivaniš