REmove invalid Characters in Unicode in SQL SERVER 2008

I want to Remove Invalid uni开发者_如何学运维code Characters from a field in sql server. How to achieve that?

What exactly do you count as "invalid" characters?

What is the data-type of the field (char/varchar) or (nchar/nvarchar)

What you may find is that this is an instance where a SQLCLR function to take a SqlString as an input and return a SqlString.

You can then use the more powerful .NET String-manipulation, Encoding, and Globalization features.