optimise files

CS/WindowsFormsApp1/App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
+    </startup>
+</configuration>

CS/WindowsFormsApp1/Form1.Designer.cs

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+namespace WindowsFormsApp1
+{
+    partial class Form1
+    {
+        /// <summary>
+        /// 必需的设计器变量。
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// 清理所有正在使用的资源。
+        /// </summary>
+        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows 窗体设计器生成的代码
+
+        /// <summary>
+        /// 设计器支持所需的方法 - 不要修改
+        /// 使用代码编辑器修改此方法的内容。
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.label1 = new System.Windows.Forms.Label();
+            this.richTextBox1 = new System.Windows.Forms.RichTextBox();
+            this.button1 = new System.Windows.Forms.Button();
+            this.textBox1 = new System.Windows.Forms.TextBox();
+            this.SuspendLayout();
+            // 
+            // label1
+            // 
+            this.label1.AutoSize = true;
+            this.label1.Location = new System.Drawing.Point(55, 52);
+            this.label1.Name = "label1";
+            this.label1.Size = new System.Drawing.Size(44, 18);
+            this.label1.TabIndex = 0;
+            this.label1.Text = "复制";
+            // 
+            // richTextBox1
+            // 
+            this.richTextBox1.Location = new System.Drawing.Point(78, 109);
+            this.richTextBox1.Name = "richTextBox1";
+            this.richTextBox1.ReadOnly = true;
+            this.richTextBox1.Size = new System.Drawing.Size(295, 217);
+            this.richTextBox1.TabIndex = 1;
+            this.richTextBox1.Text = "";
+            this.richTextBox1.TextChanged += new System.EventHandler(this.richTextBox1_TextChanged);
+            // 
+            // button1
+            // 
+            this.button1.Location = new System.Drawing.Point(366, 364);
+            this.button1.Name = "button1";
+            this.button1.Size = new System.Drawing.Size(94, 44);
+            this.button1.TabIndex = 2;
+            this.button1.Text = "复制文字";
+            this.button1.UseVisualStyleBackColor = true;
+            this.button1.Click += new System.EventHandler(this.button1_Click);
+            // 
+            // textBox1
+            // 
+            this.textBox1.CausesValidation = false;
+            this.textBox1.Location = new System.Drawing.Point(439, 109);
+            this.textBox1.Multiline = true;
+            this.textBox1.Name = "textBox1";
+            this.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
+            this.textBox1.Size = new System.Drawing.Size(302, 217);
+            this.textBox1.TabIndex = 3;
+            // 
+            // Form1
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(9F, 18F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(800, 450);
+            this.Controls.Add(this.textBox1);
+            this.Controls.Add(this.button1);
+            this.Controls.Add(this.richTextBox1);
+            this.Controls.Add(this.label1);
+            this.MaximizeBox = false;
+            this.MinimizeBox = false;
+            this.Name = "Form1";
+            this.Text = "Form1";
+            this.Load += new System.EventHandler(this.Form1_Load);
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Label label1;
+        private System.Windows.Forms.RichTextBox richTextBox1;
+        private System.Windows.Forms.Button button1;
+        private System.Windows.Forms.TextBox textBox1;
+    }
+}
+

CS/WindowsFormsApp1/Form1.cs

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+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;
+        }
+    }
+}