public void Menu()
{
int flag = 1;
while (flag != 0)
{
Console.WriteLine("\nType keywords to perform Action\n Add \tDisplay \tUpdate \tSearch \tDelete \tExit");
string choice = Console.ReadLine();
switch (choice.ToLower())
{
case "add":
contactDB.Insert(ContactDetails());
break;
case "display":
contactDB.Display();
break;
case "update": Console.WriteLine("Enter the name whose Constact is to be Updated");
contactDB.Update(Console.ReadLine());
break;
case "search": contactDB.SearchByName(Console.ReadLine());
break;
case "delete": contactDB.Delete(Console.ReadLine());
break;
case "exit":
flag = 0;
break;
default: Console.WriteLine("Enter Proper KeyWord");
break;
}
}
}