static void Main(string[] args)
{
Person P1 = new Person();
P1.Age = 20;
P1.FullName = "Ali Reza Alavi";
P1.ShowInfo();
P1.ShowFullName();
System.Console.WriteLine("\n----------");
Person P2 = new Person("Sara Ahmadi", 30);
P2.ShowInfo();
P2.ShowFullName();
System.Console.WriteLine("\n----------");
Person P3 = new Person();
P3.FullName = "Sanaz Samimi";
P3.ShowInfo();
P3.ShowFullName();
System.Console.WriteLine("\n----------");
// If you do not make a new Struct with this syntax:
// Person P3 = new Person();
// If you want to use some methods, You must initialize all of fields value!
Person P4;
P4.Age = 30;
P4.FullName = "Sanaz Samimi";
System.Console.WriteLine("\n: Age: {0}", P4.Age);
System.Console.WriteLine(": Full Name: {0}", P4.FullName);
P4.ShowInfo();
P4.ShowFullName();
System.Console.WriteLine("\n----------");
Person P5;
P5.FullName = "Akbar Abedini";
// Wrong Usage!
// System.Console.WriteLine("\n: Age: {0}", P5.Age);
System.Console.WriteLine("\n: Full Name: {0}", P5.FullName);
// Wrong Usage!
// P5.ShowInfo();
// P5.ShowFullName(); // Note: ShowFullName does not use Age field, But you will see an error!
System.Console.WriteLine("\n----------");
Person P6 = P4; // P6 is a copy of P4!
P6.FullName = "Fatemeh Asgari";
System.Console.WriteLine("\n: P5 Full Name: {0}", P5.FullName);
System.Console.WriteLine(": P6 Full Name: {0}", P6.FullName);
System.Console.WriteLine("\n----------");
// Wrong Usage!
// Because all of P5 fields did not initialized!
// Person P7 = P5;
System.Console.ReadLine();
}
