TextBox with bottom border

Question

I want to have TextBox with bottom border but Graphics drawn for TextBox is distorted/broken on resize because of Color.Transparent.

Answer 1

To have a TextBox with bottom border, The most simple workaround that I can offer is docking a 1 pixel height lable (or other control) to bottom of the TextBox:

using System.Drawing;
using System.Windows.Forms;
public class MyTextBox : TextBox
{
    public MyTextBox()
    {
        BorderStyle = System.Windows.Forms.BorderStyle.None;
        AutoSize = false; //Allows you to change height to have bottom padding
        Controls.Add(new Label()
                    { Height = 1, Dock = DockStyle.Bottom, BackColor = Color.Black });
    }
}