public static void CreateCustomer()
{
Customer C1 = new Customer();
C1.FirstName = "Adam";
C1.LastName = "Bond";
string CustomerOnefullName = C1.GetFullName();
Console.WriteLine(CustomerOnefullName);
Console.WriteLine();
PartialCustomer C2 = new PartialCustomer();
C2.FirstName = "Richard";
C2.LastName = "Mat";
string CustomerTwoFullName = C2.GetFullName();
Console.WriteLine(CustomerTwoFullName);
}