The custom control autoscalemode causes the problem of increasing the width of font

A custom control , Set in the width program , And then dynamically add it to the container , The width before adding to the container is 100, Then add it to the container , The width becomes 117 了 , puzzled , Later, I saw  AutoScaleMode This attribute , It used to be  Font , Change it to None in the future , The width is not increased .