public MysqlDb(String host, String username, String password, String database)
{
this._host = host;
this._username = username;
this._password = password;
this._database = database;
string MyConString = "SERVER="+this._host+";" +
"DATABASE="+this._database+";" +
"UID="+this._username+";" +
"PASSWORD="+this._password+";";
this._connection = new MySqlConnection(MyConString);
}