【Winform】2 Button

        // <summary>
        /// 设置透明按钮样式
        /// </summary>
        private void SetBtnStyle(Button btn)
        {
            btn.FlatStyle = FlatStyle.Flat;//样式
            btn.ForeColor = Color.Transparent;//前景
            btn.BackColor = Color.Transparent;//去背景
            btn.FlatAppearance.BorderSize = 0;//去边线
            btn.FlatAppearance.MouseOverBackColor = Color.Transparent;//鼠标经过
            btn.FlatAppearance.MouseDownBackColor = Color.Transparent;//鼠标按下
        }