using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
namespace Trim
{
    public partial class Form1 : Form
    {
        public
 
 Form1()
        {
            InitializeComponent();
        }

        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {
           // richTextBox1.BackColor = Color.Green;
        }

        private void 轉化_Click(object sender, EventArgs e)
        {
            string strWrite = string
 
.Empty;
            string strRead = richTextBox1.Text;
            CharEnumerator CEnumerator = strRead.GetEnumerator();

            while (CEnumerator.MoveNext())
            {
                byte[] array = new byte[1];
                array = System.Text.ASCIIEncoding.ASCII.GetBytes(CEnumerator.Current.ToString());
                int
 
 asciicode = (short)(array[0]);
                if (asciicode != 32)
                {
                    strWrite += CEnumerator.Current.ToString();
                }
            }
            richTextBox2.Text = strWrite;
            //Console 輸出字串
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string strWrite = string.Empty;
            string strRead = richTextBox1.Text;
            CharEnumerator CEnumerator = strRead.GetEnumerator();

            while (CEnumerator.MoveNext())
            {
                byte[] array = new byte[1];
                array = System.Text.ASCIIEncoding.ASCII.GetBytes(CEnumerator.Current.ToString());
                int asciicode = (short)(array[0]);
                if (asciicode != 32)
                {
                    strWrite += CEnumerator.Current.ToString();
                }
            }         
            //Console 輸出字串
            string l_strResult = strWrite.Replace("\n", "").Replace(" ", "").Replace("\t", "").Replace("\r", "");
            richTextBox2.Text = l_strResult;
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void 轉化ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string strWrite = string.Empty;
            string strRead = richTextBox1.Text;
            CharEnumerator CEnumerator = strRead.GetEnumerator();

            while (CEnumerator.MoveNext())
            {
                byte[] array = new byte[1];
                array = System.Text.ASCIIEncoding.ASCII.GetBytes(CEnumerator.Current.ToString());
                int asciicode = (short)(array[0]);
                if (asciicode != 32)
                {
                    strWrite += CEnumerator.Current.ToString();
                }
            }
            richTextBox2.Text = strWrite;
            //richTextBox2.Copy();
            //richTextBox2.Paste();

        }

        private void 開啟檔案ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            try
            {
                openFileDialog1.Filter = "";
                openFileDialog1.ShowDialog();
                //textBox1.Text = openFileDialog1.FileName;
                StreamReader sreader = new StreamReader(openFileDialog1.FileName, Encoding.Default);
                //openFileDialog1.
               // if (Directory.Exists(openFileDialog1.FileName))
               // {                    
                    richTextBox1.Text = sreader.ReadToEnd();
                    sreader.Close();
               // }
              //  else
              //  {
               //      MessageBox.Show("輸入檔名不能為空");
                //}
            }
            catch (FormatException)
            {
                return;
            }

        }

        private void 儲存檔案ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();
            saveFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
            string character=richTextBox2.Text;
            StreamWriter myStream;
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {            
                    myStream = new StreamWriter(saveFileDialog1.FileName);
                    myStream.Write(richTextBox2.Text); 
                    // Code to write the stream goes here.
                    myStream.Close();            
            }
        }

        private void 清空所有文字ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            richTextBox1.Clear();
            richTextBox2.Clear();
        }

        private void 複製結果ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (richTextBox2.Text.Trim() == String.Empty)
            {
                MessageBox.Show("孬孬提示：沒有要貼上的內容!");           
            }
            else
                Clipboard.SetText(richTextBox2.Text);   
        }

        private void 符號處理ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string strWrite = string.Empty;
            string strRead = richTextBox1.Text;
            CharEnumerator CEnumerator = strRead.GetEnumerator();

            while (CEnumerator.MoveNext())
            {
                byte[] array = new byte[1];
                array = System.Text.ASCIIEncoding.ASCII.GetBytes(CEnumerator.Current.ToString());
                int asciicode = (short)(array[0]);
                if (asciicode != 32)
                {
                    strWrite += CEnumerator.Current.ToString();
                }
            }
            //Console 輸出字串
            string l_strResult = strWrite.Replace("\n", "").Replace(" ", "").Replace("\t", "").Replace("\r", "").Replace(".", "。").Replace(",","，");

            richTextBox2.Text = l_strResult;
            //richTextBox2.Copy();

        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (MessageBox.Show("確定萌萌的關閉文書處理小助手麼？", "確定離開", MessageBoxButtons.OKCancel) == DialogResult.Cancel)
            {
                e.Cancel = true;
            }
        }

        private void Form1_DoubleClick(object sender, EventArgs e)
        {
            MessageBox.Show("別點啦");
        }

        private void Form1_MouseEnter(object sender, EventArgs e)
        {

        }
    }
}

百度雲下載連結：
一個處理直接從知網複製論文出現的空格，中英字元轉化的小軟體