db.Database.GetNextCharId C# (CSharp) Method

        public int GetNextCharId(Account acc)
        {
            MySqlCommand cmd = CreateQuery();
            cmd.CommandText = "SELECT IFNULL(MAX(id), 0) + 1 FROM characters WHERE accId=@accId;";
            cmd.Parameters.AddWithValue("@accId", acc.AccountId);
            var ret = (int)(long)cmd.ExecuteScalar();
            return ret;
        }