IDatabase.cs

/*
Interface
*/

using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Hotel_Management_System
{
    internal interface IDatabase
    {
        void openConnection();
        void closeConnection();
        bool getConnectionState();
        SqlConnection getConnection();
        SqlCommand executeCommand(string command);
    }
}