Split by word casing - Lists

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//Read a text, split it into words and distribute them into 3 lists.
//Lower-case words like “programming”, “at” and “databases” – consist of lowercase letters only.
//Upper-case words like “PHP”, “JS” and “SQL” – consist of uppercase letters only.
//Mixed-case words like “C#”, “SoftUni” and “Java” – all others.
//Use the following separators between the words: , ; : . ! ( ) " ' \ / [ ] space
//print the 3 lists as shown in the example below.

namespace Split_by_Word_Casing___Lists
{
    class Program
    {
        static void Main(string[] args)
        {
            char[] delimiters = ",;:.!()\"\'\\/[] ".ToCharArray();
            List <string> text = Console.ReadLine().Split(delimiters, StringSplitOptions.RemoveEmptyEntries).ToList();
            List<string> lowerCase = new List<string>();
            List<string> upperCase = new List<string>();
            List<string> mixedCase = new List<string>();
            foreach (var word in text)
            {
                if (word.Any(x => !char.IsLetter(x)))
                {
                    mixedCase.Add(word);
                }
                else if (word.ToLower().Equals(word))
                {
                    lowerCase.Add(word);
                }
                else if (word.ToUpper().Equals(word))
                {
                    upperCase.Add(word);
                }
                else
                {
                    mixedCase.Add(word);
                }
            }
            Console.WriteLine("Lower-case: " + string.Join(", ", lowerCase));
            Console.WriteLine("Mixed-case: " + string.Join(", ", mixedCase));
            Console.WriteLine("Upper-case: " + string.Join(", ", upperCase));
        }
    }
}