PasswordTextBox for Silverlight 2 Beta 1

The standard TextBox control that is built into Silverlight 2 Beta 1 is a bit lacking and is missing alot of features that we have become accustomed to in a TextBox. One of those features is being able to mask the characters being displayed when its used to accept passwords. Here's a small PasswordTextBox control I built that does just that; it masks the characters from being displayed so you can accept passwords like you're used to.