windows form textbox password
public void CreateMyPasswordTextBox()
{
// Create an instance of the TextBox control.
TextBox textBox1 = new TextBox();
// Set the maximum length of text in the control to eight.
textBox1.MaxLength = 8;
// Assign the asterisk to be the password character.
textBox1.PasswordChar = '*';
// Change all text entered to be lowercase.
textBox1.CharacterCasing = CharacterCasing.Lower;
// Align the text in the center of the TextBox control.
textBox1.TextAlign = HorizontalAlignment.Center;
}