How to use the TextBox control in a WinForms application?

To use a TextBox control in a WinForms application, you first need to drag and drop a TextBox control onto the form. After that, you can set the properties and events of the TextBox control through code or the properties window.

Here are some common usage examples:

1. Set the text content of the TextBox control:

textBox1.Text = "Hello, World!";

1. Obtain the text content of the TextBox control:

string text = textBox1.Text;

1. Clear the text content of the TextBox control.

textBox1.Clear();

1. Set the ReadOnly property of the TextBox control:

textBox1.ReadOnly = true;

1. How to enable multi-line display for a TextBox control:

textBox1.Multiline = true;

1. Set the display style of the TextBox control:

textBox1.BorderStyle = BorderStyle.FixedSingle;

1. Set the watermark text for the TextBox control.

textBox1.Text = "Please enter your name";
textBox1.ForeColor = Color.Gray;

Here are some basic examples of how the TextBox control can be used. Depending on specific requirements, the properties and events of the TextBox control can be further customized.