How to show difference for japanese, chinese and other unicode text

I'm looking for a way to programmatically, in C#, show the difference of two chunks of text.

The result, with deletes, adds are going to be shown in HTML, but that is a second step, and is an optional answer for the question.

I would like not to call/shell out to a command line if possible, ie calling third party diff tool or similar. Platform is Windows.

It must support Asian languages, such as Japanese, Chinese and Korean, meaning that traditional word b开发者_Go百科reak characters don't (necessarily) apply.

Have a look at this SO thread. Few choices for diff engine are listed there - perhaps one of them can suite you.