Here is another post of Paul Sheriff about
value converters in
Silverlight 4.
Source: Paul Sheriff's Blog
When you start to bind data in Silverlight (or WPF for that matter) you will most likely have data that is in one format that you may need to convert to another format. For example if you have a decimal number (price) that is 19.95, you would want to display it as $19.95. Of course you can use a normal .NET format string to accomplish this, but you could also write some code to convert the decimal number 19.95 to a string with the dollar sign in front of it “$19.95”.