C# Count how many chars, words , lines in a string

namespace :using System.Text.RegularExpressions

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Text.RegularExpressions;

namespace WordCounter
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();      
        }

        private void button1_Click(object sender, EventArgs e)
        {
            StartCount();
        }

        private void StartCount()
        {
            lblChar.Text = "";
            lblWord.Text = "";
            lblLine.Text = "";

            if (txtUserInput.Text != "")
            {
                string useInput = "";
                useInput = txtUserInput.Text.Trim();             

                string pattern = "[^\\w]";
                string input = useInput;

                //word count             
                int i = 0, count = 0;

               string[] words = Regex.Split(input, pattern, RegexOptions.IgnoreCase);
                for (i = words.GetLowerBound(0); i <=words.GetUpperBound(0); i++)
                {
                    if (words[i].ToString() == string.Empty)
                        count = count - 1;
                    count = count + 1;
                }
                lblWord.Text = count.ToString();

                // line count            
                string[] lines = Regex.Split(useInput.Trim(), "\r\n");                
                lblLine.Text = lines.Length.ToString();

                //char count 
                int CharCount = 0;
                foreach (string value in lines)                
                    CharCount += value.Length;
              
                lblChar.Text = CharCount.ToString();  
            }
        }
    }
}