C#自带的事件

 public event EventHandler<LineStrDataEventArgs> LineDataStrChange;   自定义事件

 p.LineDataStrChange += p_LineDataStrChange;

 void p_LineDataStrChange(object sender, LineStrDataEventArgs e)
        {}

 LineDataStrChange(this, new LineStrDataEventArgs(str, this.LineNo));

public class LineStrDataEventArgs : EventArgs
    {
        public string Value;
        public int LineNo;
        public LineStrDataEventArgs(string value, int lineNo)
        {
            this.Value = value;
            this.LineNo = lineNo;
        }
    }