optimise files

CS/WindowsFormsApp1/Form1.cs

@@ -0,0 +1,40 @@
+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;
+
+namespace WindowsFormsApp1
+{
+    public partial class Form1 : Form
+    {
+        public Form1()
+        {
+            InitializeComponent();
+        }
+
+        private void richTextBox1_TextChanged(object sender, EventArgs e)
+        {
+
+        }
+
+        private void Form1_Load(object sender, EventArgs e)
+        {
+            richTextBox1.Text = @"TextBox控件用于输入文本信息" +
+                @"此控件具有windows文本框控件所没有的" +
+                @"附加功能，包括多行编辑和密码字符屏蔽";
+            textBox1.Text = "";
+        }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            textBox1.Text += richTextBox1.SelectedText;
+            richTextBox1.SelectionFont = new Font("Kaiti", 24, FontStyle.Bold);
+            richTextBox1.SelectionColor = System.Drawing.Color.Red;
+        }
+    }
+}