Regex to exclude a particular substring pattern

Question

My current regex code is as beow .

var caption = Regex.Replace(fileImage.Caption, @"[^\w\s\(\)\.@-]", "",RegexOptions.None);

Here I replace special characters with empty character excluding certain special characters
Now I have a strange situation where I along with above match i need to exculde a substring of type × where 215 can any number . Its can be a normal decimal or hexadecimal . if it is a hexadecimal number then it starts with 'x' after &# .

How can I achive this?

Answer 1

Think you mean this,

var caption = Regex.Replace(fileImage.Caption, @"(&#x?[a-f\d]+;)|[^\w\s\(\)\.@-]", "$1");

DEMO