splitter怎么分隔下上两个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);