Hello everybody,Can someone help me fix my issue i cannot login into database,I have an open source project and need to know how to connect to db this is the ConnectionDatabaselink.cs

Code:
    class DatabaseConnectionLink
{
    public string networkLink = "Server=" + Properties.Settings.Default["SQL_IP"] + ';' + "Database=" +
    Properties.Settings.Default["SQL_Database"] + ";" + "UID=" + Properties.Settings.Default["SQL_User"] + ';' + "PWD=" +
    Properties.Settings.Default["SQL_Pass"];

    public string networkLinkDatabaseList = "Server=localhost" + Properties.Settings.Default["SQL_IP"] + ';' + 
    "UID=" + Properties.Settings.Default["SQL_User"] + ';' + "PWD=" +
    Properties.Settings.Default["SQL_Pass"];

    public string networkTestLink = "Server=localhost" + Properties.Settings.Default["SQL_IP"] + ';'
    + "UID=" + Properties.Settings.Default["SQL_User"] + ';' + "PWD=" + Properties.Settings.Default["SQL_Pass"];

    public string networkLinkCreateDatabase = "Server=localhost" + Properties.Settings.Default["SQL_IP"] + ';' +
            "UID=" + Properties.Settings.Default["SQL_User"] + ';' + "PWD=" +
            Properties.Settings.Default["SQL_Pass"];
}
}