indexof returns -1

Question

When my string is mail&mail@mail.com , the code returns -1.

How can I solve that?

email = mail&mail@mail.com
int arroba = email.IndexOf("@");

I also tried this:

int arroba = email.IndexOf("@", email.IndexOf("&"));

Any help serves me thanks

Answer 1

The problem is that the char you search has different culture from the one in your email string.

Try this:

email = "email = mail&mail@mail.com";
int result = -1;
int and = CultureInfo.InvariantCulture.CompareInfo.IndexOf(email, "&");
if(and!=-1)
result = CultureInfo.InvariantCulture.CompareInfo.IndexOf(email, "@");