这里错在哪里！

Question

if (this..WindowState = FormWindowState.Minimized)
            {
                this.WindowState = System.Windows.Forms.FormWindowState.Normal;
                this.notifyIcon1.Visible = false;  
            }
            else
            {
                this.WindowState = System.Windows.Forms.FormWindowState.Minimized;
                this.notifyIcon1.Visible = true; //窗体显示时，托盘图标不可见 
            }

Answer 1

if (this.Visible == false)// 当窗体不可见时单击显示窗体
            {
                this.Visible = true;
                this.WindowState = System.Windows.Forms.FormWindowState.Normal;
                this.notifyIcon1.Visible = true; //窗体显示时，托盘图标不可见 
            }
            else //Here
            if (this.Visible == true)// 当窗体可见时单击隐藏窗体
            {
                this.Visible = false;
                this.WindowState = System.Windows.Forms.FormWindowState.Normal;
                this.notifyIcon1.Visible = true; //窗体显示时，托盘图标不可见 
            }