Search exact text in datareader

Question

Hi to all,

I have a datareader that return the list of all users in a database, but always return text in lower or uppercase:

string CommandText = "SELECT username, password " + " FROM users" + " WHERE username = @Find";

users in database:

jose

maria

carlos

if Iwrite: JOSE in upper case, it shows the one in lowercase how to avoid this please.

Thanks in Advance