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

        private void Form1_Load(object sender, EventArgs e)
        {
            richTextBox1.Multiline = true;  //表示是多行文本框
            richTextBox1.ScrollBars = RichTextBoxScrollBars.Vertical;   //表示滚动条在垂直方向上
            richTextBox1.SelectionFont = new Font("楷体", 12, FontStyle.Bold);//设置字体、字号、是否加粗
            richTextBox1.SelectionColor = System.Drawing.Color.Blue;//设置字体颜色

        }
    }
}