如何知道c#中的字符串编码?

I am getting a string from a third party program that I don't control. My piece of the code outputs this in HTML. This works fine in English, but in other languages it will show in a funny way. For example, accents in Spanish look funny and characters in eastern languages (i.e. korean) will look very funny. I am pretty sure I need to do some encoding work so that all languages display correctly.I am getting a string from a third party progra