Yes you can do this, with an extension method. It'll look something like that:
public static class NameDoesNotMatter {
public static string smartSingleQuote(this string s) {
string result = s.Replace("'","''");
return result;
}
}
The magic is the keyword "this" in front of the first argument. Then you can write your code and it'll work:
string s = "the cat's mat sat";
string sql = s.smartsingleQuote();