C # 's textbox gets row height

When a TextBox uses multiple lines, it seems a bit problematic to get the height of each row,

TextBox.Height gets the height of the control,

And what we often do is decide whether or not to show the scroll bars based on the number of rows.

As follows:

//Cannot get the height of each row directly, but we can get the height of the font inside the textbox, the height of each word is not the line high?
int fontheight = txtdriverdescription. Font. Height;
if (Devicecount < 8)
{

Scroll bars are not displayed when the content is less than 8 lines
This.txtDriverDescription.Height = Fontheight * DEVICECOUNT;
This.txtDriverDescription.ScrollBars = Scrollbars.none;
}
Else
{
This.txtDriverDescription.Height = Fontheight * 8;
}

C # 's textbox gets row height