我正在尝试用WinForms，C#制作一个动画。我有一个计时器，每一个滴答声，我就在一个窗体上的面板周围移动一个圆圈。它工作正常，但显示不平滑，它似乎在 Flink 。有人能给我指出正确的方向吗？
为表单生成的代码：

#region Windows Form Designer generated code

/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
    this.components = new System.ComponentModel.Container();
    this.panel1 = new System.Windows.Forms.Panel();
    this.timer1 = new System.Windows.Forms.Timer(this.components);
    this.SuspendLayout();
    // 
    // panel1
    // 
    this.panel1.BackColor = System.Drawing.Color.White;
    this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
    this.panel1.Location = new System.Drawing.Point(12, 12);
    this.panel1.Name = "panel1";
    this.panel1.Size = new System.Drawing.Size(435, 313);
    this.panel1.TabIndex = 0;
    this.panel1.Paint += new System.Windows.Forms.PaintEventHandler(this.panel1_Paint);
    // 
    // timer1
    // 
    this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
    // 
    // frmBoxerTest
    // 
    this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
    this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
    this.ClientSize = new System.Drawing.Size(459, 337);
    this.Controls.Add(this.panel1);
    this.Name = "frmBoxerTest";
    this.Text = "frmBoxerTest";
    this.Load += new System.EventHandler(this.frmBoxerTest_Load);
    this.ResumeLayout(false);

}

#endregion

private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.Timer timer1;

动画的自有代码：

public partial class frmBoxerTest : Form
{
    float myLeft = 100F;
    float myTop = 100F;
    float horDirection = 10F;
    float verDirection = 8F;

    public frmBoxerTest()
    {
        InitializeComponent();
    }

    private void frmBoxerTest_Load(object sender, EventArgs e)
    {
        this.CenterToScreen();
        this.DoubleBuffered = true;

        StartShowing();
    }

    private void StartShowing()
    {

        timer1.Interval = 100;
        timer1.Enabled = true;
    }

    private void panel1_Paint(object sender, PaintEventArgs e)
    {
        //same result if I do the graphics here.
        //e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
        //e.Graphics.FillEllipse(Brushes.Black, myLeft, myTop, 50F, 50F);
    }

    private void timer1_Tick(object sender, EventArgs e)
    {

        if (panel1.Width <= myLeft + 50F || myLeft <= -1)
        {
            horDirection = horDirection * -1;   //reverse horizontal direciton
        }
        myLeft += horDirection;

        if (panel1.Height <= myTop + 50F || myTop <= -1)
        {
            verDirection = verDirection * -1;   //reverse vertical direciton
        }
        myTop += verDirection;

        Graphics g = panel1.CreateGraphics();
        g.FillRectangle(Brushes.White, 0, 0, panel1.Width, panel1.Height);
        g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
        g.FillEllipse(Brushes.Black, myLeft, myTop, 50F, 50F);

    }
}