C#：密码框的两种方式

通过PasswordChar 和 UseSystemPasswordChar 来设备密码框。

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

        private void Form1_Load(object sender, EventArgs e)
        {
            textBox1.PasswordChar = '@';
            textBox2.UseSystemPasswordChar = true;
        }
    }
}