I have a piece of code that i want to check a text string for invalid characters like the single quote, the double dash,the @ sign.

So far i haven't been able to get an accurate response from Regex.IsMatch

My test string is :
string sStringToSearch = "shawn--'test@"

My RegExpresionString is :

string sRegPattern = @"[^--'@]";

Any Ideas.....

test is :

Regex.IsMatch(sStringToSearch, sRegPattern)