static void Main()
{
FileDataAccess fileDataAccess = new FileDataAccess("");
//implicit interface member invocation: calling members of interface through the variable of class
//fileDataAccess.GetData();
//Console.WriteLine(fileDataAccess.Data);
//fileDataAccess.Test();
GetandPrintData(fileDataAccess);
}
//return type is interface (pure abstract class)
static IDataAccess Create(int choice)
{
IDataAccess dataAccess = null;
switch (choice)
{
case 1:
dataAccess = new DatabaseDataAccess();
break;
case 2:
dataAccess = new FileDataAccess();
break;
default:
break;
}
return(dataAccess);
}
