KeyDown and keyUp event to avoid repeat letter in textbox control
<p>My question is:</p>

<p>How can I disable the hold a key down in a textbox control using C#?
e.g Boxxxxxxxxxxxxxxxxxxxxx</p>

<p>I don't want to allow user to repeat any character from the keyboard.</p>

<p>Any suggestion? </p>

<p>thanks</p>
