this.MaximizeBox = false; //最大化
this.MinimizeBox = false; //最小化
this.ControlBox = false; //关闭
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;
![](https://img2020.cnblogs.com/blog/1638732/202011/1638732-20201127094639066-228446517.png)
this.MaximizeBox = false; //最大化
this.MinimizeBox = false; //最小化
this.ControlBox = false; //关闭
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;