splitter怎么分隔上下两个PANEL

this.panel1 = new System.Windows.Forms.Panel();            this.panel2 = new System.Windows.Forms.Panel();            this.splitter1 = new System.Windows.Forms.Splitter();            this.SuspendLayout();            //             // panel1            //             this.panel1.BackColor = System.Drawing.SystemColors.ActiveCaption;            this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;            this.panel1.ForeColor = System.Drawing.SystemColors.GradientActiveCaption;            this.panel1.Location = new System.Drawing.Point(0, 0);            this.panel1.Name = "panel1";            this.panel1.Size = new System.Drawing.Size(522, 558);            this.panel1.TabIndex = 0;            //             // panel2            //             this.panel2.Dock = System.Windows.Forms.DockStyle.Bottom;            this.panel2.Location = new System.Drawing.Point(0, 458);            this.panel2.Name = "panel2";            this.panel2.Size = new System.Drawing.Size(522, 100);            this.panel2.TabIndex = 1;            //             // splitter1            //             this.splitter1.Dock = System.Windows.Forms.DockStyle.Bottom;            this.splitter1.Location = new System.Drawing.Point(0, 455);            this.splitter1.Name = "splitter1";            this.splitter1.Size = new System.Drawing.Size(522, 3);            this.splitter1.TabIndex = 2;            this.splitter1.TabStop = false;            //             // Form1            //             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;            this.ClientSize = new System.Drawing.Size(522, 558);            this.Controls.Add(this.splitter1);            this.Controls.Add(this.panel2);            this.Controls.Add(this.panel1);            this.Name = "Form1";            this.Text = "Form1";            this.ResumeLayout(false);        }        #endregion        private System.Windows.Forms.Panel panel1;        private System.Windows.Forms.Panel panel2;        private System.Windows.Forms.Splitter splitter1;