Question

C#: How do you disable a key from being pressed indefinetly in textbox’s keydown event?

Answer 1

The standard way to handle that is to create an event handler for the Textbox.KeyDown event and then set KeyEventArgs.SuppressKeyPress to true if the key pressed matches the key you want to disable. Here is an example:

yourTextBox.KeyDown += delegate(Object sender, KeyEventArgs e) {     e.SuppressKeyPress = (e.KeyCode == YOUR_KEY); }