I want to create a programe read a.txt file to make every word in a line alone and remove spaces

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.IO;

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

        private void button1_Click(object sender, EventArgs e)
        {
            if (openFileDialog1.ShowDialog()==DialogResult.OK)
            {
                StreamReader Reader = new StreamReader(openFileDialog1.OpenFile());
              
                txteditor.Text= File.ReadAllText(openFileDialog1.FileName);

                char[] arr = txteditor.Text.ToCharArray();
                System.Text.StringBuilder stt = new StringBuilder();
                foreach (char c in arr)
                {

                    if (c != ' ')
                        stt.Append(c);
                    if (c == ' ')
                    {
                        stt.Append(System.Environment.NewLine);
                    }
                }
                txteditor.Text = stt.ToString();
            }
        }
       
        private void btnSave_Click(object sender, EventArgs e)
        {

            if (saveFileDialog1.ShowDialog()==DialogResult.OK)
               
            {
              
                System.IO.File.WriteAllText(saveFileDialog1.FileName,txteditor.Text) ;
                
            }
        }

    }
}