WebSocketSharp 请参考官网
https://github.com/sta/websoc...
坑:

ws.OnMessage += (sender, e) => { BalloonForm balloon = new
BalloonForm("标题", "内容", "底部");

  balloon.Visible = false;  balloon.ShowDialog();//此处弹窗必须使用模式对话框,否则窗体打开里面控件样式不显示,鼠标一直显示加载状态 

}

弹窗代码

using System;using System.Collections.Generic;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace xxxx.page{   public class BalloonForm : Form    {        private System.ComponentModel.IContainer components = null;                private Label title;        private Label textContent;        private Label staticTime;        private Timer timer1;        private Timer timer2;        private Timer timer3;        public int StayTime = 5000;        private int heightMax, widthMax;                protected override void Dispose(bool disposing)        {            if (disposing && (components != null))            {                components.Dispose();            }            base.Dispose(disposing);        }        #region Windows Form Designer generated code                private void InitializeComponent()        {            this.components = new System.ComponentModel.Container();            this.title = new Label();            this.textContent = new Label();            this.staticTime = new Label();            this.timer1 = new Timer(this.components);            this.timer2 = new Timer(this.components);            this.timer3 = new Timer(this.components);            this.SuspendLayout();            //             // title            //             this.title.AutoSize = true;            this.title.Location = new Point(10, 10);            this.title.Name = "title";            this.title.TabIndex = 0;            this.title.Text = "标题";            //             // textContent            //             this.textContent.AutoSize = true;            this.textContent.Location = new Point(30, 40);            this.textContent.Font= new Font("宋体",12, FontStyle.Bold, GraphicsUnit.Point, ((byte)(134)));            this.textContent.Name = "textContent";            this.textContent.TabIndex = 0;            this.textContent.Text = "内容";            //             // staticTime            //             this.staticTime.AutoSize = true;            this.staticTime.Location = new Point(120, 90);            this.staticTime.Name = "staticTime";            this.staticTime.TabIndex = 0;            this.staticTime.Text = "开始时间";            //             // timer1            //             this.timer1.Interval = 10;            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);            //             // timer2            //             this.timer2.Interval = 10;            this.timer2.Tick += new System.EventHandler(this.timer2_Tick);            //             // timer3            //             this.timer3.Interval = 10;            this.timer3.Tick += new System.EventHandler(this.timer3_Tick);            //             // BalloonForm            //             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;            this.BackColor = System.Drawing.Color.White;            this.ClientSize = new System.Drawing.Size(200, 120);            this.Controls.Add(this.title);            this.Controls.Add(this.textContent);            this.Controls.Add(this.staticTime);            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;            this.MaximizeBox = false;            this.MinimizeBox = false;            this.Name = "BalloonForm";            this.Opacity = 1;            this.ShowIcon = false;            this.ShowInTaskbar = false;            this.StartPosition = System.Windows.Forms.FormStartPosition.Manual;            this.Text = "BalloonForm";            this.TopMost = true;            this.Load += new System.EventHandler(this.BalloonForm_Load);            //this.ResumeLayout(false);            //this.PerformLayout();        }        #endregion        public string BalloonText        {            get { return this.title.Text; }            set { this.title.Text = value; }        }        public Color BalloonBackColor        {            get { return this.BackColor; }            set { this.BackColor = value; }        }        public Color BalloonForeColor        {            get { return this.title.ForeColor; }            set { this.title.ForeColor = value; }        }        public BalloonForm(string title,string textContent,string staticTime)        {            //方法一:不进行跨线程安全检查              CheckForIllegalCrossThreadCalls = false;            InitializeComponent();            this.title.Text = title;            this.textContent.Text = textContent;            this.staticTime.Text = staticTime;            this.HeightMax = 120;//窗体滚动的高度            this.WidthMax = 260;//窗体滚动的宽度            this.ScrollShow();        }        private void timer1_Tick(object sender, EventArgs e)        {            ScrollUp();        }        private void timer2_Tick(object sender, EventArgs e)        {            timer2.Enabled = false;            timer3.Enabled = true;        }        private void timer3_Tick(object sender, EventArgs e)        {            ScrollDown();        }        public int HeightMax        {            set            {                heightMax = value;            }            get            {                return heightMax;            }        }        public int WidthMax        {            set            {                widthMax = value;            }            get            {                return widthMax;            }        }        public void ScrollShow()        {            this.Width = widthMax;            this.Height = 0;            this.Show();            this.timer1.Enabled = true;        }        private void ScrollUp()        {            if (Height < heightMax)            {                this.Height += 3;                this.Location = new Point(this.Location.X, this.Location.Y - 3);            }            else            {                this.timer1.Enabled = false;                this.timer2.Enabled = true;            }        }        private void ScrollDown()        {            if (Height > 3)            {                this.Height -= 3;                this.Location = new Point(this.Location.X, this.Location.Y + 3);            }            else            {                this.timer3.Enabled = false;                this.Close();            }        }        private void BalloonForm_Load(object sender, EventArgs e)        {            Screen screen = Screen.PrimaryScreen; ;//获取屏幕变量            this.Location = new Point(screen.WorkingArea.Width - widthMax - 20, screen.WorkingArea.Height - 38);//WorkingArea为Windows桌面的工作区            this.timer2.Interval = StayTime;        }    }}