form1.cs

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 XNAGame_007
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        //窗体paint事件
        //方法写在按钮事件中，当窗体图形被其他窗体遮盖，或者最小化，图形就消失了
        private void button1_Click(object sender, EventArgs e)
        {
            Graphics g1 = this.CreateGraphics();
            Pen pen1 = new Pen(Color.Blue);
            SolidBrush brush1 = new SolidBrush(Color.Red);
            int top = 30;
            int left = 30;
            int width = 50;
            int height = 50;
            g1.DrawEllipse(pen1, top, left, width, height);
            g1.FillEllipse(brush1, top, left, width, height);
        }
 
        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g1 = this.CreateGraphics();
            Pen pen1 = new Pen(Color.Blue);
            SolidBrush brush1 = new SolidBrush(Color.Red);
            int top = 100;
            int left = 100;
            int width = 50;
            int height = 50;
            g1.DrawEllipse(pen1, top, left, width, height);
            g1.FillEllipse(brush1, top, left, width, height);
        }
    }
}

【手游开发】