1. PicBox控件   

        顺便一提关键字:stretch [stretʃ] vt. 伸展,张开

C#(winform)实现不同DPI控件自适应1_自适应C#(winform)实现不同DPI控件自适应1_Windows_02
//控制pictureBox图片的显示格式
this.picClose.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Stretch;
//这个才是控制跟随DPI自适应的
this.picClose.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
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2.label控件

      如果是在LayoutPanel中,可以尝试 AutoSize = true